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Finding the Fourth Proportional to 1,803.91, 2,706.92 and 763.85

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Solution

The fourth proportional to 1,803.91, 2,706.92 and 763.85 is: 1,146.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,803.91 : 2,706.92 = 763.85 : x
  2. Step 2: Convert to fraction form
    1,803.91/2,706.92 = 763.85/x
  3. Step 3: Cross multiply
    1,803.91x = 2,706.92 × 763.85
  4. Step 4: Simplify right side
    1,803.91x = 2,067,680.84
  5. Step 5: Solve for x
    x = 2,067,680.84/1,803.91
  6. Step 6: Final answer
    x = 1,146.22

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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.