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Finding the Fourth Proportional to 416.08, 624.12 and 172.61

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Solution

The fourth proportional to 416.08, 624.12 and 172.61 is: 258.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.08 : 624.12 = 172.61 : x
  2. Step 2: Convert to fraction form
    416.08/624.12 = 172.61/x
  3. Step 3: Cross multiply
    416.08x = 624.12 × 172.61
  4. Step 4: Simplify right side
    416.08x = 107,726.23
  5. Step 5: Solve for x
    x = 107,726.23/416.08
  6. Step 6: Final answer
    x = 258.91

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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.