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Finding the Fourth Proportional to 418.52, 627.62 and 187.40

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Solution

The fourth proportional to 418.52, 627.62 and 187.40 is: 281.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.52 : 627.62 = 187.40 : x
  2. Step 2: Convert to fraction form
    418.52/627.62 = 187.40/x
  3. Step 3: Cross multiply
    418.52x = 627.62 × 187.40
  4. Step 4: Simplify right side
    418.52x = 117,611.91
  5. Step 5: Solve for x
    x = 117,611.91/418.52
  6. Step 6: Final answer
    x = 281.02

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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.