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Finding the Fourth Proportional to 398.59, 597.92 and 124.72

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Solution

The fourth proportional to 398.59, 597.92 and 124.72 is: 187.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.59 : 597.92 = 124.72 : x
  2. Step 2: Convert to fraction form
    398.59/597.92 = 124.72/x
  3. Step 3: Cross multiply
    398.59x = 597.92 × 124.72
  4. Step 4: Simplify right side
    398.59x = 74,570.46
  5. Step 5: Solve for x
    x = 74,570.46/398.59
  6. Step 6: Final answer
    x = 187.09

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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.