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Finding the Fourth Proportional to 398.89, 598.37 and 124.91

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Solution

The fourth proportional to 398.89, 598.37 and 124.91 is: 187.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.89 : 598.37 = 124.91 : x
  2. Step 2: Convert to fraction form
    398.89/598.37 = 124.91/x
  3. Step 3: Cross multiply
    398.89x = 598.37 × 124.91
  4. Step 4: Simplify right side
    398.89x = 74,740.90
  5. Step 5: Solve for x
    x = 74,740.90/398.89
  6. Step 6: Final answer
    x = 187.37

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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.