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Finding the Fourth Proportional to 951.96, 1,425.04 and 639.32

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Solution

The fourth proportional to 951.96, 1,425.04 and 639.32 is: 957.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.96 : 1,425.04 = 639.32 : x
  2. Step 2: Convert to fraction form
    951.96/1,425.04 = 639.32/x
  3. Step 3: Cross multiply
    951.96x = 1,425.04 × 639.32
  4. Step 4: Simplify right side
    951.96x = 911,056.57
  5. Step 5: Solve for x
    x = 911,056.57/951.96
  6. Step 6: Final answer
    x = 957.03

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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.