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Finding the Fourth Proportional to 3,966.66, 5,472.78 and 2,287.86

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Solution

The fourth proportional to 3,966.66, 5,472.78 and 2,287.86 is: 3,156.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,966.66 : 5,472.78 = 2,287.86 : x
  2. Step 2: Convert to fraction form
    3,966.66/5,472.78 = 2,287.86/x
  3. Step 3: Cross multiply
    3,966.66x = 5,472.78 × 2,287.86
  4. Step 4: Simplify right side
    3,966.66x = 12,520,954.45
  5. Step 5: Solve for x
    x = 12,520,954.45/3,966.66
  6. Step 6: Final answer
    x = 3,156.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.