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Finding the Fourth Proportional to 1,249.59, 1,724.16 and 725.34

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Solution

The fourth proportional to 1,249.59, 1,724.16 and 725.34 is: 1,000.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,249.59 : 1,724.16 = 725.34 : x
  2. Step 2: Convert to fraction form
    1,249.59/1,724.16 = 725.34/x
  3. Step 3: Cross multiply
    1,249.59x = 1,724.16 × 725.34
  4. Step 4: Simplify right side
    1,249.59x = 1,250,593.59
  5. Step 5: Solve for x
    x = 1,250,593.59/1,249.59
  6. Step 6: Final answer
    x = 1,000.81

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1.5x scale

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.