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Finding the Fourth Proportional to 417.06, 625.47 and 124.55

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Solution

The fourth proportional to 417.06, 625.47 and 124.55 is: 186.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.06 : 625.47 = 124.55 : x
  2. Step 2: Convert to fraction form
    417.06/625.47 = 124.55/x
  3. Step 3: Cross multiply
    417.06x = 625.47 × 124.55
  4. Step 4: Simplify right side
    417.06x = 77,899.16
  5. Step 5: Solve for x
    x = 77,899.16/417.06
  6. Step 6: Final answer
    x = 186.78

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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.