Home / 1,285.18-1,773.36-725.57

Finding the Fourth Proportional to 1,285.18, 1,773.36 and 725.57

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Solution

The fourth proportional to 1,285.18, 1,773.36 and 725.57 is: 1,001.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.18 : 1,773.36 = 725.57 : x
  2. Step 2: Convert to fraction form
    1,285.18/1,773.36 = 725.57/x
  3. Step 3: Cross multiply
    1,285.18x = 1,773.36 × 725.57
  4. Step 4: Simplify right side
    1,285.18x = 1,286,694.60
  5. Step 5: Solve for x
    x = 1,286,694.60/1,285.18
  6. Step 6: Final answer
    x = 1,001.18

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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.