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Finding the Fourth Proportional to 611.03, 915.32 and 394.15

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Solution

The fourth proportional to 611.03, 915.32 and 394.15 is: 590.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.03 : 915.32 = 394.15 : x
  2. Step 2: Convert to fraction form
    611.03/915.32 = 394.15/x
  3. Step 3: Cross multiply
    611.03x = 915.32 × 394.15
  4. Step 4: Simplify right side
    611.03x = 360,773.38
  5. Step 5: Solve for x
    x = 360,773.38/611.03
  6. Step 6: Final answer
    x = 590.43

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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.