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Finding the Fourth Proportional to 611.28, 915.89 and 337.64

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Solution

The fourth proportional to 611.28, 915.89 and 337.64 is: 505.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.28 : 915.89 = 337.64 : x
  2. Step 2: Convert to fraction form
    611.28/915.89 = 337.64/x
  3. Step 3: Cross multiply
    611.28x = 915.89 × 337.64
  4. Step 4: Simplify right side
    611.28x = 309,234.83
  5. Step 5: Solve for x
    x = 309,234.83/611.28
  6. Step 6: Final answer
    x = 505.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.