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Finding the Fourth Proportional to 951.76, 1,424.76 and 879.76

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Solution

The fourth proportional to 951.76, 1,424.76 and 879.76 is: 1,316.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.76 : 1,424.76 = 879.76 : x
  2. Step 2: Convert to fraction form
    951.76/1,424.76 = 879.76/x
  3. Step 3: Cross multiply
    951.76x = 1,424.76 × 879.76
  4. Step 4: Simplify right side
    951.76x = 1,253,446.86
  5. Step 5: Solve for x
    x = 1,253,446.86/951.76
  6. Step 6: Final answer
    x = 1,316.98

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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.