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Finding the Fourth Proportional to 951.24, 1,425.78 and 929.64

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Solution

The fourth proportional to 951.24, 1,425.78 and 929.64 is: 1,393.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.24 : 1,425.78 = 929.64 : x
  2. Step 2: Convert to fraction form
    951.24/1,425.78 = 929.64/x
  3. Step 3: Cross multiply
    951.24x = 1,425.78 × 929.64
  4. Step 4: Simplify right side
    951.24x = 1,325,462.12
  5. Step 5: Solve for x
    x = 1,325,462.12/951.24
  6. Step 6: Final answer
    x = 1,393.40

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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.