Home / 728,701.75-1,005,610.20-406,432.72

Finding the Fourth Proportional to 728,701.75, 1,005,610.20 and 406,432.72

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Solution

The fourth proportional to 728,701.75, 1,005,610.20 and 406,432.72 is: 560,878.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,701.75 : 1,005,610.20 = 406,432.72 : x
  2. Step 2: Convert to fraction form
    728,701.75/1,005,610.20 = 406,432.72/x
  3. Step 3: Cross multiply
    728,701.75x = 1,005,610.20 × 406,432.72
  4. Step 4: Simplify right side
    728,701.75x = 408,712,886,331.72
  5. Step 5: Solve for x
    x = 408,712,886,331.72/728,701.75
  6. Step 6: Final answer
    x = 560,878.15

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.