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Finding the Fourth Proportional to 732.38, 1,010.66 and 400.79

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Solution

The fourth proportional to 732.38, 1,010.66 and 400.79 is: 553.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    732.38 : 1,010.66 = 400.79 : x
  2. Step 2: Convert to fraction form
    732.38/1,010.66 = 400.79/x
  3. Step 3: Cross multiply
    732.38x = 1,010.66 × 400.79
  4. Step 4: Simplify right side
    732.38x = 405,062.94
  5. Step 5: Solve for x
    x = 405,062.94/732.38
  6. Step 6: Final answer
    x = 553.08

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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.