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Finding the Fourth Proportional to 766.02, 1,057.50 and 691.32

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Solution

The fourth proportional to 766.02, 1,057.50 and 691.32 is: 954.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.02 : 1,057.50 = 691.32 : x
  2. Step 2: Convert to fraction form
    766.02/1,057.50 = 691.32/x
  3. Step 3: Cross multiply
    766.02x = 1,057.50 × 691.32
  4. Step 4: Simplify right side
    766.02x = 731,070.90
  5. Step 5: Solve for x
    x = 731,070.90/766.02
  6. Step 6: Final answer
    x = 954.38

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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.