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Finding the Fourth Proportional to 4,915.81, 7,381.11 and 4,229.95

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Solution

The fourth proportional to 4,915.81, 7,381.11 and 4,229.95 is: 6,351.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,915.81 : 7,381.11 = 4,229.95 : x
  2. Step 2: Convert to fraction form
    4,915.81/7,381.11 = 4,229.95/x
  3. Step 3: Cross multiply
    4,915.81x = 7,381.11 × 4,229.95
  4. Step 4: Simplify right side
    4,915.81x = 31,221,726.24
  5. Step 5: Solve for x
    x = 31,221,726.24/4,915.81
  6. Step 6: Final answer
    x = 6,351.29

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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.