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Finding the Fourth Proportional to 574.99, 861.27 and 379.32

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Solution

The fourth proportional to 574.99, 861.27 and 379.32 is: 568.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.99 : 861.27 = 379.32 : x
  2. Step 2: Convert to fraction form
    574.99/861.27 = 379.32/x
  3. Step 3: Cross multiply
    574.99x = 861.27 × 379.32
  4. Step 4: Simplify right side
    574.99x = 326,696.94
  5. Step 5: Solve for x
    x = 326,696.94/574.99
  6. Step 6: Final answer
    x = 568.18

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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.