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Finding the Fourth Proportional to 3,939.52, 5,909.20 and 1,203.52

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Solution

The fourth proportional to 3,939.52, 5,909.20 and 1,203.52 is: 1,805.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.52 : 5,909.20 = 1,203.52 : x
  2. Step 2: Convert to fraction form
    3,939.52/5,909.20 = 1,203.52/x
  3. Step 3: Cross multiply
    3,939.52x = 5,909.20 × 1,203.52
  4. Step 4: Simplify right side
    3,939.52x = 7,111,840.38
  5. Step 5: Solve for x
    x = 7,111,840.38/3,939.52
  6. Step 6: Final answer
    x = 1,805.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.