Home / 728,426.85-1,092,640.28-392,503.65

Finding the Fourth Proportional to 728,426.85, 1,092,640.28 and 392,503.65

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Solution

The fourth proportional to 728,426.85, 1,092,640.28 and 392,503.65 is: 588,755.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,426.85 : 1,092,640.28 = 392,503.65 : x
  2. Step 2: Convert to fraction form
    728,426.85/1,092,640.28 = 392,503.65/x
  3. Step 3: Cross multiply
    728,426.85x = 1,092,640.28 × 392,503.65
  4. Step 4: Simplify right side
    728,426.85x = 428,865,296,074.50
  5. Step 5: Solve for x
    x = 428,865,296,074.50/728,426.85
  6. Step 6: Final answer
    x = 588,755.48

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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.