Home / 786,086.40-1,179,378.80-280,636.20

Finding the Fourth Proportional to 786,086.40, 1,179,378.80 and 280,636.20

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Solution

The fourth proportional to 786,086.40, 1,179,378.80 and 280,636.20 is: 421,043.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,086.40 : 1,179,378.80 = 280,636.20 : x
  2. Step 2: Convert to fraction form
    786,086.40/1,179,378.80 = 280,636.20/x
  3. Step 3: Cross multiply
    786,086.40x = 1,179,378.80 × 280,636.20
  4. Step 4: Simplify right side
    786,086.40x = 330,976,384,792.56
  5. Step 5: Solve for x
    x = 330,976,384,792.56/786,086.40
  6. Step 6: Final answer
    x = 421,043.27

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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.