Home / 1,209,947,710.80-1,814,921,566.20-392,142,680.40

Finding the Fourth Proportional to 1,209,947,710.80, 1,814,921,566.20 and 392,142,680.40

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Solution

The fourth proportional to 1,209,947,710.80, 1,814,921,566.20 and 392,142,680.40 is: 588,214,020.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,947,710.80 : 1,814,921,566.20 = 392,142,680.40 : x
  2. Step 2: Convert to fraction form
    1,209,947,710.80/1,814,921,566.20 = 392,142,680.40/x
  3. Step 3: Cross multiply
    1,209,947,710.80x = 1,814,921,566.20 × 392,142,680.40
  4. Step 4: Simplify right side
    1,209,947,710.80x = 711,708,207,685,433,984
  5. Step 5: Solve for x
    x = 711,708,207,685,433,984/1,209,947,710.80
  6. Step 6: Final answer
    x = 588,214,020.60

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.