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Finding the Fourth Proportional to 869.23, 1,301.28 and 560.62

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Solution

The fourth proportional to 869.23, 1,301.28 and 560.62 is: 839.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.23 : 1,301.28 = 560.62 : x
  2. Step 2: Convert to fraction form
    869.23/1,301.28 = 560.62/x
  3. Step 3: Cross multiply
    869.23x = 1,301.28 × 560.62
  4. Step 4: Simplify right side
    869.23x = 729,523.59
  5. Step 5: Solve for x
    x = 729,523.59/869.23
  6. Step 6: Final answer
    x = 839.28

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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.