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Finding the Fourth Proportional to 1,249.55, 1,723.84 and 823.63

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Solution

The fourth proportional to 1,249.55, 1,723.84 and 823.63 is: 1,136.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,249.55 : 1,723.84 = 823.63 : x
  2. Step 2: Convert to fraction form
    1,249.55/1,723.84 = 823.63/x
  3. Step 3: Cross multiply
    1,249.55x = 1,723.84 × 823.63
  4. Step 4: Simplify right side
    1,249.55x = 1,419,803.20
  5. Step 5: Solve for x
    x = 1,419,803.20/1,249.55
  6. Step 6: Final answer
    x = 1,136.25

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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.