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Finding the Fourth Proportional to 3,939.52, 5,909.22 and 1,017.80

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Solution

The fourth proportional to 3,939.52, 5,909.22 and 1,017.80 is: 1,526.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.52 : 5,909.22 = 1,017.80 : x
  2. Step 2: Convert to fraction form
    3,939.52/5,909.22 = 1,017.80/x
  3. Step 3: Cross multiply
    3,939.52x = 5,909.22 × 1,017.80
  4. Step 4: Simplify right side
    3,939.52x = 6,014,404.12
  5. Step 5: Solve for x
    x = 6,014,404.12/3,939.52
  6. Step 6: Final answer
    x = 1,526.68

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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.