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Finding the Fourth Proportional to 2,491.76, 3,737.64 and 1,381.86

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Solution

The fourth proportional to 2,491.76, 3,737.64 and 1,381.86 is: 2,072.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,491.76 : 3,737.64 = 1,381.86 : x
  2. Step 2: Convert to fraction form
    2,491.76/3,737.64 = 1,381.86/x
  3. Step 3: Cross multiply
    2,491.76x = 3,737.64 × 1,381.86
  4. Step 4: Simplify right side
    2,491.76x = 5,164,895.21
  5. Step 5: Solve for x
    x = 5,164,895.21/2,491.76
  6. Step 6: Final answer
    x = 2,072.79

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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.