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Finding the Fourth Proportional to 732.46, 1,010.80 and 400.90

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Solution

The fourth proportional to 732.46, 1,010.80 and 400.90 is: 553.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    732.46 : 1,010.80 = 400.90 : x
  2. Step 2: Convert to fraction form
    732.46/1,010.80 = 400.90/x
  3. Step 3: Cross multiply
    732.46x = 1,010.80 × 400.90
  4. Step 4: Simplify right side
    732.46x = 405,229.72
  5. Step 5: Solve for x
    x = 405,229.72/732.46
  6. Step 6: Final answer
    x = 553.24

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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.