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Finding the Fourth Proportional to 418.40, 627.06 and 174.76

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Solution

The fourth proportional to 418.40, 627.06 and 174.76 is: 261.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.40 : 627.06 = 174.76 : x
  2. Step 2: Convert to fraction form
    418.40/627.06 = 174.76/x
  3. Step 3: Cross multiply
    418.40x = 627.06 × 174.76
  4. Step 4: Simplify right side
    418.40x = 109,585.01
  5. Step 5: Solve for x
    x = 109,585.01/418.40
  6. Step 6: Final answer
    x = 261.91

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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.