Home / 3,939.60-5,909.38-1,017.78

Finding the Fourth Proportional to 3,939.60, 5,909.38 and 1,017.78

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Solution

The fourth proportional to 3,939.60, 5,909.38 and 1,017.78 is: 1,526.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.60 : 5,909.38 = 1,017.78 : x
  2. Step 2: Convert to fraction form
    3,939.60/5,909.38 = 1,017.78/x
  3. Step 3: Cross multiply
    3,939.60x = 5,909.38 × 1,017.78
  4. Step 4: Simplify right side
    3,939.60x = 6,014,448.78
  5. Step 5: Solve for x
    x = 6,014,448.78/3,939.60
  6. Step 6: Final answer
    x = 1,526.66

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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.