Home / 1,120,003.80-1,680,005.70-278,555.55

Finding the Fourth Proportional to 1,120,003.80, 1,680,005.70 and 278,555.55

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Solution

The fourth proportional to 1,120,003.80, 1,680,005.70 and 278,555.55 is: 417,833.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120,003.80 : 1,680,005.70 = 278,555.55 : x
  2. Step 2: Convert to fraction form
    1,120,003.80/1,680,005.70 = 278,555.55/x
  3. Step 3: Cross multiply
    1,120,003.80x = 1,680,005.70 × 278,555.55
  4. Step 4: Simplify right side
    1,120,003.80x = 467,974,911,766.64
  5. Step 5: Solve for x
    x = 467,974,911,766.64/1,120,003.80
  6. Step 6: Final answer
    x = 417,833.33

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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.