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Finding the Fourth Proportional to 951.31, 1,425.90 and 719.45

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Solution

The fourth proportional to 951.31, 1,425.90 and 719.45 is: 1,078.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.31 : 1,425.90 = 719.45 : x
  2. Step 2: Convert to fraction form
    951.31/1,425.90 = 719.45/x
  3. Step 3: Cross multiply
    951.31x = 1,425.90 × 719.45
  4. Step 4: Simplify right side
    951.31x = 1,025,863.76
  5. Step 5: Solve for x
    x = 1,025,863.76/951.31
  6. Step 6: Final answer
    x = 1,078.37

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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.