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Finding the Fourth Proportional to 817.92, 1,225.26 and 787.86

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Solution

The fourth proportional to 817.92, 1,225.26 and 787.86 is: 1,180.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    817.92 : 1,225.26 = 787.86 : x
  2. Step 2: Convert to fraction form
    817.92/1,225.26 = 787.86/x
  3. Step 3: Cross multiply
    817.92x = 1,225.26 × 787.86
  4. Step 4: Simplify right side
    817.92x = 965,333.34
  5. Step 5: Solve for x
    x = 965,333.34/817.92
  6. Step 6: Final answer
    x = 1,180.23

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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.