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Finding the Fourth Proportional to 611.68, 844.08 and 378.88

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Solution

The fourth proportional to 611.68, 844.08 and 378.88 is: 522.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.68 : 844.08 = 378.88 : x
  2. Step 2: Convert to fraction form
    611.68/844.08 = 378.88/x
  3. Step 3: Cross multiply
    611.68x = 844.08 × 378.88
  4. Step 4: Simplify right side
    611.68x = 319,805.03
  5. Step 5: Solve for x
    x = 319,805.03/611.68
  6. Step 6: Final answer
    x = 522.83

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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.