Home / 3,939.40-5,909.40-1,017.70

Finding the Fourth Proportional to 3,939.40, 5,909.40 and 1,017.70

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Solution

The fourth proportional to 3,939.40, 5,909.40 and 1,017.70 is: 1,526.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.40 : 5,909.40 = 1,017.70 : x
  2. Step 2: Convert to fraction form
    3,939.40/5,909.40 = 1,017.70/x
  3. Step 3: Cross multiply
    3,939.40x = 5,909.40 × 1,017.70
  4. Step 4: Simplify right side
    3,939.40x = 6,013,996.38
  5. Step 5: Solve for x
    x = 6,013,996.38/3,939.40
  6. Step 6: Final answer
    x = 1,526.63

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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.