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Finding the Fourth Proportional to 1,761.58, 2,639.11 and 1,273.42

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Solution

The fourth proportional to 1,761.58, 2,639.11 and 1,273.42 is: 1,907.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,761.58 : 2,639.11 = 1,273.42 : x
  2. Step 2: Convert to fraction form
    1,761.58/2,639.11 = 1,273.42/x
  3. Step 3: Cross multiply
    1,761.58x = 2,639.11 × 1,273.42
  4. Step 4: Simplify right side
    1,761.58x = 3,360,695.46
  5. Step 5: Solve for x
    x = 3,360,695.46/1,761.58
  6. Step 6: Final answer
    x = 1,907.77

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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.