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Finding the Fourth Proportional to 632.85, 872.89 and 580.56

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Solution

The fourth proportional to 632.85, 872.89 and 580.56 is: 800.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.85 : 872.89 = 580.56 : x
  2. Step 2: Convert to fraction form
    632.85/872.89 = 580.56/x
  3. Step 3: Cross multiply
    632.85x = 872.89 × 580.56
  4. Step 4: Simplify right side
    632.85x = 506,765.02
  5. Step 5: Solve for x
    x = 506,765.02/632.85
  6. Step 6: Final answer
    x = 800.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.