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Finding the Fourth Proportional to 611.08, 915.97 and 286.18

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Solution

The fourth proportional to 611.08, 915.97 and 286.18 is: 428.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.08 : 915.97 = 286.18 : x
  2. Step 2: Convert to fraction form
    611.08/915.97 = 286.18/x
  3. Step 3: Cross multiply
    611.08x = 915.97 × 286.18
  4. Step 4: Simplify right side
    611.08x = 262,132.29
  5. Step 5: Solve for x
    x = 262,132.29/611.08
  6. Step 6: Final answer
    x = 428.97

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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.