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Finding the Fourth Proportional to 611.58, 844.29 and 378.84

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Solution

The fourth proportional to 611.58, 844.29 and 378.84 is: 522.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.58 : 844.29 = 378.84 : x
  2. Step 2: Convert to fraction form
    611.58/844.29 = 378.84/x
  3. Step 3: Cross multiply
    611.58x = 844.29 × 378.84
  4. Step 4: Simplify right side
    611.58x = 319,850.82
  5. Step 5: Solve for x
    x = 319,850.82/611.58
  6. Step 6: Final answer
    x = 522.99

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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.