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Finding the Fourth Proportional to 418.86, 627.96 and 158.70

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Solution

The fourth proportional to 418.86, 627.96 and 158.70 is: 237.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.86 : 627.96 = 158.70 : x
  2. Step 2: Convert to fraction form
    418.86/627.96 = 158.70/x
  3. Step 3: Cross multiply
    418.86x = 627.96 × 158.70
  4. Step 4: Simplify right side
    418.86x = 99,657.25
  5. Step 5: Solve for x
    x = 99,657.25/418.86
  6. Step 6: Final answer
    x = 237.92

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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.