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Finding the Fourth Proportional to 418.47, 627.60 and 144.57

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Solution

The fourth proportional to 418.47, 627.60 and 144.57 is: 216.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.47 : 627.60 = 144.57 : x
  2. Step 2: Convert to fraction form
    418.47/627.60 = 144.57/x
  3. Step 3: Cross multiply
    418.47x = 627.60 × 144.57
  4. Step 4: Simplify right side
    418.47x = 90,732.13
  5. Step 5: Solve for x
    x = 90,732.13/418.47
  6. Step 6: Final answer
    x = 216.82

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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.