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Finding the Fourth Proportional to 3,106.52, 4,659.78 and 915.27

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Solution

The fourth proportional to 3,106.52, 4,659.78 and 915.27 is: 1,372.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.52 : 4,659.78 = 915.27 : x
  2. Step 2: Convert to fraction form
    3,106.52/4,659.78 = 915.27/x
  3. Step 3: Cross multiply
    3,106.52x = 4,659.78 × 915.27
  4. Step 4: Simplify right side
    3,106.52x = 4,264,956.84
  5. Step 5: Solve for x
    x = 4,264,956.84/3,106.52
  6. Step 6: Final answer
    x = 1,372.91

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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.