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Finding the Fourth Proportional to 574.49, 861.75 and 266.60

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Solution

The fourth proportional to 574.49, 861.75 and 266.60 is: 399.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.49 : 861.75 = 266.60 : x
  2. Step 2: Convert to fraction form
    574.49/861.75 = 266.60/x
  3. Step 3: Cross multiply
    574.49x = 861.75 × 266.60
  4. Step 4: Simplify right side
    574.49x = 229,742.55
  5. Step 5: Solve for x
    x = 229,742.55/574.49
  6. Step 6: Final answer
    x = 399.91

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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.