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Finding the Fourth Proportional to 832.80, 1,149.21 and 501.30

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Solution

The fourth proportional to 832.80, 1,149.21 and 501.30 is: 691.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    832.80 : 1,149.21 = 501.30 : x
  2. Step 2: Convert to fraction form
    832.80/1,149.21 = 501.30/x
  3. Step 3: Cross multiply
    832.80x = 1,149.21 × 501.30
  4. Step 4: Simplify right side
    832.80x = 576,098.97
  5. Step 5: Solve for x
    x = 576,098.97/832.80
  6. Step 6: Final answer
    x = 691.76

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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.