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Finding the Fourth Proportional to 3,957.37, 5,931.15 and 2,639.95

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Solution

The fourth proportional to 3,957.37, 5,931.15 and 2,639.95 is: 3,956.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,957.37 : 5,931.15 = 2,639.95 : x
  2. Step 2: Convert to fraction form
    3,957.37/5,931.15 = 2,639.95/x
  3. Step 3: Cross multiply
    3,957.37x = 5,931.15 × 2,639.95
  4. Step 4: Simplify right side
    3,957.37x = 15,657,939.44
  5. Step 5: Solve for x
    x = 15,657,939.44/3,957.37
  6. Step 6: Final answer
    x = 3,956.65

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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.