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Finding the Fourth Proportional to 3,107.26, 4,660.88 and 915.94

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Solution

The fourth proportional to 3,107.26, 4,660.88 and 915.94 is: 1,373.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.26 : 4,660.88 = 915.94 : x
  2. Step 2: Convert to fraction form
    3,107.26/4,660.88 = 915.94/x
  3. Step 3: Cross multiply
    3,107.26x = 4,660.88 × 915.94
  4. Step 4: Simplify right side
    3,107.26x = 4,269,086.43
  5. Step 5: Solve for x
    x = 4,269,086.43/3,107.26
  6. Step 6: Final answer
    x = 1,373.91

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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.