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Finding the Fourth Proportional to 826.17, 1,140.08 and 476.97

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Solution

The fourth proportional to 826.17, 1,140.08 and 476.97 is: 658.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.17 : 1,140.08 = 476.97 : x
  2. Step 2: Convert to fraction form
    826.17/1,140.08 = 476.97/x
  3. Step 3: Cross multiply
    826.17x = 1,140.08 × 476.97
  4. Step 4: Simplify right side
    826.17x = 543,781.57
  5. Step 5: Solve for x
    x = 543,781.57/826.17
  6. Step 6: Final answer
    x = 658.20

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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.