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Finding the Fourth Proportional to 574.58, 861.38 and 476.80

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Solution

The fourth proportional to 574.58, 861.38 and 476.80 is: 714.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.58 : 861.38 = 476.80 : x
  2. Step 2: Convert to fraction form
    574.58/861.38 = 476.80/x
  3. Step 3: Cross multiply
    574.58x = 861.38 × 476.80
  4. Step 4: Simplify right side
    574.58x = 410,709.33
  5. Step 5: Solve for x
    x = 410,709.33/574.58
  6. Step 6: Final answer
    x = 714.80

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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.