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Finding the Fourth Proportional to 611.16, 915.26 and 394.12

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Solution

The fourth proportional to 611.16, 915.26 and 394.12 is: 590.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.16 : 915.26 = 394.12 : x
  2. Step 2: Convert to fraction form
    611.16/915.26 = 394.12/x
  3. Step 3: Cross multiply
    611.16x = 915.26 × 394.12
  4. Step 4: Simplify right side
    611.16x = 360,722.27
  5. Step 5: Solve for x
    x = 360,722.27/611.16
  6. Step 6: Final answer
    x = 590.23

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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.