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Finding the Fourth Proportional to 625.81, 935.28 and 576.56

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Solution

The fourth proportional to 625.81, 935.28 and 576.56 is: 861.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.81 : 935.28 = 576.56 : x
  2. Step 2: Convert to fraction form
    625.81/935.28 = 576.56/x
  3. Step 3: Cross multiply
    625.81x = 935.28 × 576.56
  4. Step 4: Simplify right side
    625.81x = 539,245.04
  5. Step 5: Solve for x
    x = 539,245.04/625.81
  6. Step 6: Final answer
    x = 861.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.