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Finding the Fourth Proportional to 580.40, 869.28 and 575.48

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Solution

The fourth proportional to 580.40, 869.28 and 575.48 is: 861.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.40 : 869.28 = 575.48 : x
  2. Step 2: Convert to fraction form
    580.40/869.28 = 575.48/x
  3. Step 3: Cross multiply
    580.40x = 869.28 × 575.48
  4. Step 4: Simplify right side
    580.40x = 500,253.25
  5. Step 5: Solve for x
    x = 500,253.25/580.40
  6. Step 6: Final answer
    x = 861.91

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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.