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Finding the Fourth Proportional to 801.92, 1,107.12 and 591.68

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Solution

The fourth proportional to 801.92, 1,107.12 and 591.68 is: 816.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.92 : 1,107.12 = 591.68 : x
  2. Step 2: Convert to fraction form
    801.92/1,107.12 = 591.68/x
  3. Step 3: Cross multiply
    801.92x = 1,107.12 × 591.68
  4. Step 4: Simplify right side
    801.92x = 655,060.76
  5. Step 5: Solve for x
    x = 655,060.76/801.92
  6. Step 6: Final answer
    x = 816.87

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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.