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Finding the Fourth Proportional to 611.95, 844.15 and 379.03

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Solution

The fourth proportional to 611.95, 844.15 and 379.03 is: 522.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.95 : 844.15 = 379.03 : x
  2. Step 2: Convert to fraction form
    611.95/844.15 = 379.03/x
  3. Step 3: Cross multiply
    611.95x = 844.15 × 379.03
  4. Step 4: Simplify right side
    611.95x = 319,958.17
  5. Step 5: Solve for x
    x = 319,958.17/611.95
  6. Step 6: Final answer
    x = 522.85

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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.