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Finding the Fourth Proportional to 574.70, 861.84 and 438.62

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Solution

The fourth proportional to 574.70, 861.84 and 438.62 is: 657.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.70 : 861.84 = 438.62 : x
  2. Step 2: Convert to fraction form
    574.70/861.84 = 438.62/x
  3. Step 3: Cross multiply
    574.70x = 861.84 × 438.62
  4. Step 4: Simplify right side
    574.70x = 378,015.95
  5. Step 5: Solve for x
    x = 378,015.95/574.70
  6. Step 6: Final answer
    x = 657.77

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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.