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Finding the Fourth Proportional to 416.32, 624.24 and 127.72

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Solution

The fourth proportional to 416.32, 624.24 and 127.72 is: 191.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.32 : 624.24 = 127.72 : x
  2. Step 2: Convert to fraction form
    416.32/624.24 = 127.72/x
  3. Step 3: Cross multiply
    416.32x = 624.24 × 127.72
  4. Step 4: Simplify right side
    416.32x = 79,727.93
  5. Step 5: Solve for x
    x = 79,727.93/416.32
  6. Step 6: Final answer
    x = 191.51

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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.