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Finding the Fourth Proportional to 379.95, 567.09 and 331.08

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Solution

The fourth proportional to 379.95, 567.09 and 331.08 is: 494.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.95 : 567.09 = 331.08 : x
  2. Step 2: Convert to fraction form
    379.95/567.09 = 331.08/x
  3. Step 3: Cross multiply
    379.95x = 567.09 × 331.08
  4. Step 4: Simplify right side
    379.95x = 187,752.16
  5. Step 5: Solve for x
    x = 187,752.16/379.95
  6. Step 6: Final answer
    x = 494.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.