Home / 1,469.04-2,202.87-688.78

Finding the Fourth Proportional to 1,469.04, 2,202.87 and 688.78

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Solution

The fourth proportional to 1,469.04, 2,202.87 and 688.78 is: 1,032.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,469.04 : 2,202.87 = 688.78 : x
  2. Step 2: Convert to fraction form
    1,469.04/2,202.87 = 688.78/x
  3. Step 3: Cross multiply
    1,469.04x = 2,202.87 × 688.78
  4. Step 4: Simplify right side
    1,469.04x = 1,517,292.80
  5. Step 5: Solve for x
    x = 1,517,292.80/1,469.04
  6. Step 6: Final answer
    x = 1,032.85

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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.