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Finding the Fourth Proportional to 415.96, 624 and 127.36

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Solution

The fourth proportional to 415.96, 624 and 127.36 is: 191.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.96 : 624 = 127.36 : x
  2. Step 2: Convert to fraction form
    415.96/624 = 127.36/x
  3. Step 3: Cross multiply
    415.96x = 624 × 127.36
  4. Step 4: Simplify right side
    415.96x = 79,472.64
  5. Step 5: Solve for x
    x = 79,472.64/415.96
  6. Step 6: Final answer
    x = 191.06

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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.