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Finding the Fourth Proportional to 1,959.79, 2,703.92 and 1,120.45

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Solution

The fourth proportional to 1,959.79, 2,703.92 and 1,120.45 is: 1,545.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,959.79 : 2,703.92 = 1,120.45 : x
  2. Step 2: Convert to fraction form
    1,959.79/2,703.92 = 1,120.45/x
  3. Step 3: Cross multiply
    1,959.79x = 2,703.92 × 1,120.45
  4. Step 4: Simplify right side
    1,959.79x = 3,029,604.94
  5. Step 5: Solve for x
    x = 3,029,604.94/1,959.79
  6. Step 6: Final answer
    x = 1,545.88

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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.