Home / 728,700.31-1,005,608.21-406,431.28

Finding the Fourth Proportional to 728,700.31, 1,005,608.21 and 406,431.28

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Solution

The fourth proportional to 728,700.31, 1,005,608.21 and 406,431.28 is: 560,876.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,700.31 : 1,005,608.21 = 406,431.28 : x
  2. Step 2: Convert to fraction form
    728,700.31/1,005,608.21 = 406,431.28/x
  3. Step 3: Cross multiply
    728,700.31x = 1,005,608.21 × 406,431.28
  4. Step 4: Simplify right side
    728,700.31x = 408,710,631,968.81
  5. Step 5: Solve for x
    x = 408,710,631,968.81/728,700.31
  6. Step 6: Final answer
    x = 560,876.16

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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.