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Finding the Fourth Proportional to 580.28, 869.83 and 255.59

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Solution

The fourth proportional to 580.28, 869.83 and 255.59 is: 383.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.28 : 869.83 = 255.59 : x
  2. Step 2: Convert to fraction form
    580.28/869.83 = 255.59/x
  3. Step 3: Cross multiply
    580.28x = 869.83 × 255.59
  4. Step 4: Simplify right side
    580.28x = 222,314.86
  5. Step 5: Solve for x
    x = 222,314.86/580.28
  6. Step 6: Final answer
    x = 383.12

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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.