Home / 728,746.96-1,005,672.30-406,448.74

Finding the Fourth Proportional to 728,746.96, 1,005,672.30 and 406,448.74

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Solution

The fourth proportional to 728,746.96, 1,005,672.30 and 406,448.74 is: 560,900.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,746.96 : 1,005,672.30 = 406,448.74 : x
  2. Step 2: Convert to fraction form
    728,746.96/1,005,672.30 = 406,448.74/x
  3. Step 3: Cross multiply
    728,746.96x = 1,005,672.30 × 406,448.74
  4. Step 4: Simplify right side
    728,746.96x = 408,754,239,187.90
  5. Step 5: Solve for x
    x = 408,754,239,187.90/728,746.96
  6. Step 6: Final answer
    x = 560,900.10

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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.