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Finding the Fourth Proportional to 565.97, 781.38 and 379.80

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Solution

The fourth proportional to 565.97, 781.38 and 379.80 is: 524.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    565.97 : 781.38 = 379.80 : x
  2. Step 2: Convert to fraction form
    565.97/781.38 = 379.80/x
  3. Step 3: Cross multiply
    565.97x = 781.38 × 379.80
  4. Step 4: Simplify right side
    565.97x = 296,768.12
  5. Step 5: Solve for x
    x = 296,768.12/565.97
  6. Step 6: Final answer
    x = 524.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.