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Finding the Fourth Proportional to 3,381.15, 5,072.04 and 915.99

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Solution

The fourth proportional to 3,381.15, 5,072.04 and 915.99 is: 1,374.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,381.15 : 5,072.04 = 915.99 : x
  2. Step 2: Convert to fraction form
    3,381.15/5,072.04 = 915.99/x
  3. Step 3: Cross multiply
    3,381.15x = 5,072.04 × 915.99
  4. Step 4: Simplify right side
    3,381.15x = 4,645,937.92
  5. Step 5: Solve for x
    x = 4,645,937.92/3,381.15
  6. Step 6: Final answer
    x = 1,374.07

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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.