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Finding the Fourth Proportional to 415.93, 624.18 and 172.46

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Solution

The fourth proportional to 415.93, 624.18 and 172.46 is: 258.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.93 : 624.18 = 172.46 : x
  2. Step 2: Convert to fraction form
    415.93/624.18 = 172.46/x
  3. Step 3: Cross multiply
    415.93x = 624.18 × 172.46
  4. Step 4: Simplify right side
    415.93x = 107,646.08
  5. Step 5: Solve for x
    x = 107,646.08/415.93
  6. Step 6: Final answer
    x = 258.81

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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.