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Finding the Fourth Proportional to 574.79, 861.66 and 209.48

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Solution

The fourth proportional to 574.79, 861.66 and 209.48 is: 314.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.79 : 861.66 = 209.48 : x
  2. Step 2: Convert to fraction form
    574.79/861.66 = 209.48/x
  3. Step 3: Cross multiply
    574.79x = 861.66 × 209.48
  4. Step 4: Simplify right side
    574.79x = 180,502.69
  5. Step 5: Solve for x
    x = 180,502.69/574.79
  6. Step 6: Final answer
    x = 314.03

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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.