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Finding the Fourth Proportional to 580.11, 869.52 and 442.71

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Solution

The fourth proportional to 580.11, 869.52 and 442.71 is: 663.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.11 : 869.52 = 442.71 : x
  2. Step 2: Convert to fraction form
    580.11/869.52 = 442.71/x
  3. Step 3: Cross multiply
    580.11x = 869.52 × 442.71
  4. Step 4: Simplify right side
    580.11x = 384,945.20
  5. Step 5: Solve for x
    x = 384,945.20/580.11
  6. Step 6: Final answer
    x = 663.57

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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.