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Finding the Fourth Proportional to 472.72, 707.44 and 461.92

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Solution

The fourth proportional to 472.72, 707.44 and 461.92 is: 691.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.72 : 707.44 = 461.92 : x
  2. Step 2: Convert to fraction form
    472.72/707.44 = 461.92/x
  3. Step 3: Cross multiply
    472.72x = 707.44 × 461.92
  4. Step 4: Simplify right side
    472.72x = 326,780.68
  5. Step 5: Solve for x
    x = 326,780.68/472.72
  6. Step 6: Final answer
    x = 691.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.