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Finding the Fourth Proportional to 3,965.65, 5,947.71 and 2,915.89

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Solution

The fourth proportional to 3,965.65, 5,947.71 and 2,915.89 is: 4,373.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,965.65 : 5,947.71 = 2,915.89 : x
  2. Step 2: Convert to fraction form
    3,965.65/5,947.71 = 2,915.89/x
  3. Step 3: Cross multiply
    3,965.65x = 5,947.71 × 2,915.89
  4. Step 4: Simplify right side
    3,965.65x = 17,342,868.11
  5. Step 5: Solve for x
    x = 17,342,868.11/3,965.65
  6. Step 6: Final answer
    x = 4,373.27

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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.