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Finding the Fourth Proportional to 1,249.12, 1,724.34 and 968.68

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Solution

The fourth proportional to 1,249.12, 1,724.34 and 968.68 is: 1,337.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,249.12 : 1,724.34 = 968.68 : x
  2. Step 2: Convert to fraction form
    1,249.12/1,724.34 = 968.68/x
  3. Step 3: Cross multiply
    1,249.12x = 1,724.34 × 968.68
  4. Step 4: Simplify right side
    1,249.12x = 1,670,333.67
  5. Step 5: Solve for x
    x = 1,670,333.67/1,249.12
  6. Step 6: Final answer
    x = 1,337.21

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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.