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Finding the Fourth Proportional to 3,105.68, 4,658.52 and 915.96

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Solution

The fourth proportional to 3,105.68, 4,658.52 and 915.96 is: 1,373.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.68 : 4,658.52 = 915.96 : x
  2. Step 2: Convert to fraction form
    3,105.68/4,658.52 = 915.96/x
  3. Step 3: Cross multiply
    3,105.68x = 4,658.52 × 915.96
  4. Step 4: Simplify right side
    3,105.68x = 4,267,017.98
  5. Step 5: Solve for x
    x = 4,267,017.98/3,105.68
  6. Step 6: Final answer
    x = 1,373.94

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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.