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Finding the Fourth Proportional to 1,372.88, 2,061.84 and 826.22

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Solution

The fourth proportional to 1,372.88, 2,061.84 and 826.22 is: 1,240.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.88 : 2,061.84 = 826.22 : x
  2. Step 2: Convert to fraction form
    1,372.88/2,061.84 = 826.22/x
  3. Step 3: Cross multiply
    1,372.88x = 2,061.84 × 826.22
  4. Step 4: Simplify right side
    1,372.88x = 1,703,533.44
  5. Step 5: Solve for x
    x = 1,703,533.44/1,372.88
  6. Step 6: Final answer
    x = 1,240.85

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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.