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Finding the Fourth Proportional to 3,107.17, 4,660.94 and 915.94

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Solution

The fourth proportional to 3,107.17, 4,660.94 and 915.94 is: 1,373.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.17 : 4,660.94 = 915.94 : x
  2. Step 2: Convert to fraction form
    3,107.17/4,660.94 = 915.94/x
  3. Step 3: Cross multiply
    3,107.17x = 4,660.94 × 915.94
  4. Step 4: Simplify right side
    3,107.17x = 4,269,141.38
  5. Step 5: Solve for x
    x = 4,269,141.38/3,107.17
  6. Step 6: Final answer
    x = 1,373.96

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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.