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Finding the Fourth Proportional to 742.46, 1,024.68 and 427.74

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Solution

The fourth proportional to 742.46, 1,024.68 and 427.74 is: 590.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.46 : 1,024.68 = 427.74 : x
  2. Step 2: Convert to fraction form
    742.46/1,024.68 = 427.74/x
  3. Step 3: Cross multiply
    742.46x = 1,024.68 × 427.74
  4. Step 4: Simplify right side
    742.46x = 438,295.02
  5. Step 5: Solve for x
    x = 438,295.02/742.46
  6. Step 6: Final answer
    x = 590.33

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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.