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Finding the Fourth Proportional to 3,107.15, 4,659.26 and 915.44

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Solution

The fourth proportional to 3,107.15, 4,659.26 and 915.44 is: 1,372.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.15 : 4,659.26 = 915.44 : x
  2. Step 2: Convert to fraction form
    3,107.15/4,659.26 = 915.44/x
  3. Step 3: Cross multiply
    3,107.15x = 4,659.26 × 915.44
  4. Step 4: Simplify right side
    3,107.15x = 4,265,286.91
  5. Step 5: Solve for x
    x = 4,265,286.91/3,107.15
  6. Step 6: Final answer
    x = 1,372.73

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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.