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Finding the Fourth Proportional to 1,249.56, 1,724.32 and 682.28

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Solution

The fourth proportional to 1,249.56, 1,724.32 and 682.28 is: 941.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,249.56 : 1,724.32 = 682.28 : x
  2. Step 2: Convert to fraction form
    1,249.56/1,724.32 = 682.28/x
  3. Step 3: Cross multiply
    1,249.56x = 1,724.32 × 682.28
  4. Step 4: Simplify right side
    1,249.56x = 1,176,473.36
  5. Step 5: Solve for x
    x = 1,176,473.36/1,249.56
  6. Step 6: Final answer
    x = 941.51

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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.