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Finding the Fourth Proportional to 3,380.88, 5,071.29 and 915.94

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Solution

The fourth proportional to 3,380.88, 5,071.29 and 915.94 is: 1,373.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,380.88 : 5,071.29 = 915.94 : x
  2. Step 2: Convert to fraction form
    3,380.88/5,071.29 = 915.94/x
  3. Step 3: Cross multiply
    3,380.88x = 5,071.29 × 915.94
  4. Step 4: Simplify right side
    3,380.88x = 4,644,997.36
  5. Step 5: Solve for x
    x = 4,644,997.36/3,380.88
  6. Step 6: Final answer
    x = 1,373.90

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1.5x scale

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.