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Finding the Fourth Proportional to 580.24, 869.82 and 397.72

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Solution

The fourth proportional to 580.24, 869.82 and 397.72 is: 596.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.24 : 869.82 = 397.72 : x
  2. Step 2: Convert to fraction form
    580.24/869.82 = 397.72/x
  3. Step 3: Cross multiply
    580.24x = 869.82 × 397.72
  4. Step 4: Simplify right side
    580.24x = 345,944.81
  5. Step 5: Solve for x
    x = 345,944.81/580.24
  6. Step 6: Final answer
    x = 596.21

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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.