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Finding the Fourth Proportional to 418.61, 627.89 and 162.11

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Solution

The fourth proportional to 418.61, 627.89 and 162.11 is: 243.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.61 : 627.89 = 162.11 : x
  2. Step 2: Convert to fraction form
    418.61/627.89 = 162.11/x
  3. Step 3: Cross multiply
    418.61x = 627.89 × 162.11
  4. Step 4: Simplify right side
    418.61x = 101,783.30
  5. Step 5: Solve for x
    x = 101,783.30/418.61
  6. Step 6: Final answer
    x = 243.15

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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.