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Finding the Fourth Proportional to 742.38, 1,024.47 and 410.80

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Solution

The fourth proportional to 742.38, 1,024.47 and 410.80 is: 566.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.38 : 1,024.47 = 410.80 : x
  2. Step 2: Convert to fraction form
    742.38/1,024.47 = 410.80/x
  3. Step 3: Cross multiply
    742.38x = 1,024.47 × 410.80
  4. Step 4: Simplify right side
    742.38x = 420,852.28
  5. Step 5: Solve for x
    x = 420,852.28/742.38
  6. Step 6: Final answer
    x = 566.90

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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.