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Finding the Fourth Proportional to 951.31, 1,311.51 and 930.61

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Solution

The fourth proportional to 951.31, 1,311.51 and 930.61 is: 1,282.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.31 : 1,311.51 = 930.61 : x
  2. Step 2: Convert to fraction form
    951.31/1,311.51 = 930.61/x
  3. Step 3: Cross multiply
    951.31x = 1,311.51 × 930.61
  4. Step 4: Simplify right side
    951.31x = 1,220,504.32
  5. Step 5: Solve for x
    x = 1,220,504.32/951.31
  6. Step 6: Final answer
    x = 1,282.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.