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Finding the Fourth Proportional to 951.84, 1,424.52 and 861.96

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Solution

The fourth proportional to 951.84, 1,424.52 and 861.96 is: 1,290.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.84 : 1,424.52 = 861.96 : x
  2. Step 2: Convert to fraction form
    951.84/1,424.52 = 861.96/x
  3. Step 3: Cross multiply
    951.84x = 1,424.52 × 861.96
  4. Step 4: Simplify right side
    951.84x = 1,227,879.26
  5. Step 5: Solve for x
    x = 1,227,879.26/951.84
  6. Step 6: Final answer
    x = 1,290.01

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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.