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Finding the Fourth Proportional to 1,948.80, 2,682.80 and 1,761.72

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Solution

The fourth proportional to 1,948.80, 2,682.80 and 1,761.72 is: 2,425.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,948.80 : 2,682.80 = 1,761.72 : x
  2. Step 2: Convert to fraction form
    1,948.80/2,682.80 = 1,761.72/x
  3. Step 3: Cross multiply
    1,948.80x = 2,682.80 × 1,761.72
  4. Step 4: Simplify right side
    1,948.80x = 4,726,342.42
  5. Step 5: Solve for x
    x = 4,726,342.42/1,948.80
  6. Step 6: Final answer
    x = 2,425.26

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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.