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Finding the Fourth Proportional to 500.72, 691.80 and 417.56

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Solution

The fourth proportional to 500.72, 691.80 and 417.56 is: 576.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.72 : 691.80 = 417.56 : x
  2. Step 2: Convert to fraction form
    500.72/691.80 = 417.56/x
  3. Step 3: Cross multiply
    500.72x = 691.80 × 417.56
  4. Step 4: Simplify right side
    500.72x = 288,868.01
  5. Step 5: Solve for x
    x = 288,868.01/500.72
  6. Step 6: Final answer
    x = 576.91

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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.