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Finding the Fourth Proportional to 728.27, 1,004.68 and 507.29

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Solution

The fourth proportional to 728.27, 1,004.68 and 507.29 is: 699.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    728.27 : 1,004.68 = 507.29 : x
  2. Step 2: Convert to fraction form
    728.27/1,004.68 = 507.29/x
  3. Step 3: Cross multiply
    728.27x = 1,004.68 × 507.29
  4. Step 4: Simplify right side
    728.27x = 509,664.12
  5. Step 5: Solve for x
    x = 509,664.12/728.27
  6. Step 6: Final answer
    x = 699.83

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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.