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Finding the Fourth Proportional to 462.20, 637.56 and 314.92

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Solution

The fourth proportional to 462.20, 637.56 and 314.92 is: 434.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.20 : 637.56 = 314.92 : x
  2. Step 2: Convert to fraction form
    462.20/637.56 = 314.92/x
  3. Step 3: Cross multiply
    462.20x = 637.56 × 314.92
  4. Step 4: Simplify right side
    462.20x = 200,780.40
  5. Step 5: Solve for x
    x = 200,780.40/462.20
  6. Step 6: Final answer
    x = 434.40

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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.