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Finding the Fourth Proportional to 732.43, 1,010.74 and 400.85

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Solution

The fourth proportional to 732.43, 1,010.74 and 400.85 is: 553.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    732.43 : 1,010.74 = 400.85 : x
  2. Step 2: Convert to fraction form
    732.43/1,010.74 = 400.85/x
  3. Step 3: Cross multiply
    732.43x = 1,010.74 × 400.85
  4. Step 4: Simplify right side
    732.43x = 405,154.37
  5. Step 5: Solve for x
    x = 405,154.37/732.43
  6. Step 6: Final answer
    x = 553.17

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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.