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Finding the Fourth Proportional to 717.92, 1,076.70 and 525.19

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Solution

The fourth proportional to 717.92, 1,076.70 and 525.19 is: 787.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.92 : 1,076.70 = 525.19 : x
  2. Step 2: Convert to fraction form
    717.92/1,076.70 = 525.19/x
  3. Step 3: Cross multiply
    717.92x = 1,076.70 × 525.19
  4. Step 4: Simplify right side
    717.92x = 565,472.07
  5. Step 5: Solve for x
    x = 565,472.07/717.92
  6. Step 6: Final answer
    x = 787.65

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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.