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Finding the Fourth Proportional to 2,891.76, 4,329.42 and 1,915.92

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Solution

The fourth proportional to 2,891.76, 4,329.42 and 1,915.92 is: 2,868.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,891.76 : 4,329.42 = 1,915.92 : x
  2. Step 2: Convert to fraction form
    2,891.76/4,329.42 = 1,915.92/x
  3. Step 3: Cross multiply
    2,891.76x = 4,329.42 × 1,915.92
  4. Step 4: Simplify right side
    2,891.76x = 8,294,822.37
  5. Step 5: Solve for x
    x = 8,294,822.37/2,891.76
  6. Step 6: Final answer
    x = 2,868.43

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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.