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Finding the Fourth Proportional to 314.92, 472.34 and 132.40

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Solution

The fourth proportional to 314.92, 472.34 and 132.40 is: 198.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.92 : 472.34 = 132.40 : x
  2. Step 2: Convert to fraction form
    314.92/472.34 = 132.40/x
  3. Step 3: Cross multiply
    314.92x = 472.34 × 132.40
  4. Step 4: Simplify right side
    314.92x = 62,537.82
  5. Step 5: Solve for x
    x = 62,537.82/314.92
  6. Step 6: Final answer
    x = 198.58

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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.