Home / 1,236.28-1,705.98-725.40

Finding the Fourth Proportional to 1,236.28, 1,705.98 and 725.40

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Solution

The fourth proportional to 1,236.28, 1,705.98 and 725.40 is: 1,001.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.28 : 1,705.98 = 725.40 : x
  2. Step 2: Convert to fraction form
    1,236.28/1,705.98 = 725.40/x
  3. Step 3: Cross multiply
    1,236.28x = 1,705.98 × 725.40
  4. Step 4: Simplify right side
    1,236.28x = 1,237,517.89
  5. Step 5: Solve for x
    x = 1,237,517.89/1,236.28
  6. Step 6: Final answer
    x = 1,001.00

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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.