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Finding the Fourth Proportional to 418.10, 627.18 and 174.38

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Solution

The fourth proportional to 418.10, 627.18 and 174.38 is: 261.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.10 : 627.18 = 174.38 : x
  2. Step 2: Convert to fraction form
    418.10/627.18 = 174.38/x
  3. Step 3: Cross multiply
    418.10x = 627.18 × 174.38
  4. Step 4: Simplify right side
    418.10x = 109,368.56
  5. Step 5: Solve for x
    x = 109,368.56/418.10
  6. Step 6: Final answer
    x = 261.58

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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.