Home / 3,990.40-5,985.30-1,769.92

Finding the Fourth Proportional to 3,990.40, 5,985.30 and 1,769.92

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Solution

The fourth proportional to 3,990.40, 5,985.30 and 1,769.92 is: 2,654.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.40 : 5,985.30 = 1,769.92 : x
  2. Step 2: Convert to fraction form
    3,990.40/5,985.30 = 1,769.92/x
  3. Step 3: Cross multiply
    3,990.40x = 5,985.30 × 1,769.92
  4. Step 4: Simplify right side
    3,990.40x = 10,593,502.18
  5. Step 5: Solve for x
    x = 10,593,502.18/3,990.40
  6. Step 6: Final answer
    x = 2,654.75

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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.