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Finding the Fourth Proportional to 2,695.80, 4,043.70 and 747.84

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Solution

The fourth proportional to 2,695.80, 4,043.70 and 747.84 is: 1,121.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,695.80 : 4,043.70 = 747.84 : x
  2. Step 2: Convert to fraction form
    2,695.80/4,043.70 = 747.84/x
  3. Step 3: Cross multiply
    2,695.80x = 4,043.70 × 747.84
  4. Step 4: Simplify right side
    2,695.80x = 3,024,040.61
  5. Step 5: Solve for x
    x = 3,024,040.61/2,695.80
  6. Step 6: Final answer
    x = 1,121.76

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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.