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Finding the Fourth Proportional to 951.92, 1,425.72 and 518.48

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Solution

The fourth proportional to 951.92, 1,425.72 and 518.48 is: 776.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.92 : 1,425.72 = 518.48 : x
  2. Step 2: Convert to fraction form
    951.92/1,425.72 = 518.48/x
  3. Step 3: Cross multiply
    951.92x = 1,425.72 × 518.48
  4. Step 4: Simplify right side
    951.92x = 739,207.31
  5. Step 5: Solve for x
    x = 739,207.31/951.92
  6. Step 6: Final answer
    x = 776.54

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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.