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Finding the Fourth Proportional to 2,160.56, 2,982.84 and 1,375.28

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Solution

The fourth proportional to 2,160.56, 2,982.84 and 1,375.28 is: 1,898.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.56 : 2,982.84 = 1,375.28 : x
  2. Step 2: Convert to fraction form
    2,160.56/2,982.84 = 1,375.28/x
  3. Step 3: Cross multiply
    2,160.56x = 2,982.84 × 1,375.28
  4. Step 4: Simplify right side
    2,160.56x = 4,102,240.20
  5. Step 5: Solve for x
    x = 4,102,240.20/2,160.56
  6. Step 6: Final answer
    x = 1,898.69

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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.