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Finding the Fourth Proportional to 732.31, 1,010.47 and 421.75

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Solution

The fourth proportional to 732.31, 1,010.47 and 421.75 is: 581.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    732.31 : 1,010.47 = 421.75 : x
  2. Step 2: Convert to fraction form
    732.31/1,010.47 = 421.75/x
  3. Step 3: Cross multiply
    732.31x = 1,010.47 × 421.75
  4. Step 4: Simplify right side
    732.31x = 426,165.72
  5. Step 5: Solve for x
    x = 426,165.72/732.31
  6. Step 6: Final answer
    x = 581.95

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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.