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Finding the Fourth Proportional to 731.87, 1,010.01 and 400.31

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Solution

The fourth proportional to 731.87, 1,010.01 and 400.31 is: 552.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.87 : 1,010.01 = 400.31 : x
  2. Step 2: Convert to fraction form
    731.87/1,010.01 = 400.31/x
  3. Step 3: Cross multiply
    731.87x = 1,010.01 × 400.31
  4. Step 4: Simplify right side
    731.87x = 404,317.10
  5. Step 5: Solve for x
    x = 404,317.10/731.87
  6. Step 6: Final answer
    x = 552.44

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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.