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Finding the Fourth Proportional to 1,249.72, 1,725.04 and 853.33

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Solution

The fourth proportional to 1,249.72, 1,725.04 and 853.33 is: 1,177.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,249.72 : 1,725.04 = 853.33 : x
  2. Step 2: Convert to fraction form
    1,249.72/1,725.04 = 853.33/x
  3. Step 3: Cross multiply
    1,249.72x = 1,725.04 × 853.33
  4. Step 4: Simplify right side
    1,249.72x = 1,472,028.38
  5. Step 5: Solve for x
    x = 1,472,028.38/1,249.72
  6. Step 6: Final answer
    x = 1,177.89

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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.