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Finding the Fourth Proportional to 732.39, 1,010.68 and 400.81

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Solution

The fourth proportional to 732.39, 1,010.68 and 400.81 is: 553.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    732.39 : 1,010.68 = 400.81 : x
  2. Step 2: Convert to fraction form
    732.39/1,010.68 = 400.81/x
  3. Step 3: Cross multiply
    732.39x = 1,010.68 × 400.81
  4. Step 4: Simplify right side
    732.39x = 405,089.78
  5. Step 5: Solve for x
    x = 405,089.78/732.39
  6. Step 6: Final answer
    x = 553.11

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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.