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Finding the Fourth Proportional to 2,491.53, 3,438.54 and 1,372.71

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Solution

The fourth proportional to 2,491.53, 3,438.54 and 1,372.71 is: 1,894.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,491.53 : 3,438.54 = 1,372.71 : x
  2. Step 2: Convert to fraction form
    2,491.53/3,438.54 = 1,372.71/x
  3. Step 3: Cross multiply
    2,491.53x = 3,438.54 × 1,372.71
  4. Step 4: Simplify right side
    2,491.53x = 4,720,118.24
  5. Step 5: Solve for x
    x = 4,720,118.24/2,491.53
  6. Step 6: Final answer
    x = 1,894.47

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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.