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Finding the Fourth Proportional to 634.16, 951.24 and 429.12

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Solution

The fourth proportional to 634.16, 951.24 and 429.12 is: 643.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.16 : 951.24 = 429.12 : x
  2. Step 2: Convert to fraction form
    634.16/951.24 = 429.12/x
  3. Step 3: Cross multiply
    634.16x = 951.24 × 429.12
  4. Step 4: Simplify right side
    634.16x = 408,196.11
  5. Step 5: Solve for x
    x = 408,196.11/634.16
  6. Step 6: Final answer
    x = 643.68

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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.