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Finding the Fourth Proportional to 869.58, 1,306.38 and 577.26

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Solution

The fourth proportional to 869.58, 1,306.38 and 577.26 is: 867.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.58 : 1,306.38 = 577.26 : x
  2. Step 2: Convert to fraction form
    869.58/1,306.38 = 577.26/x
  3. Step 3: Cross multiply
    869.58x = 1,306.38 × 577.26
  4. Step 4: Simplify right side
    869.58x = 754,120.92
  5. Step 5: Solve for x
    x = 754,120.92/869.58
  6. Step 6: Final answer
    x = 867.22

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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.