Home / 3,985.40-5,979.26-1,764.15

Finding the Fourth Proportional to 3,985.40, 5,979.26 and 1,764.15

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Solution

The fourth proportional to 3,985.40, 5,979.26 and 1,764.15 is: 2,646.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.40 : 5,979.26 = 1,764.15 : x
  2. Step 2: Convert to fraction form
    3,985.40/5,979.26 = 1,764.15/x
  3. Step 3: Cross multiply
    3,985.40x = 5,979.26 × 1,764.15
  4. Step 4: Simplify right side
    3,985.40x = 10,548,311.53
  5. Step 5: Solve for x
    x = 10,548,311.53/3,985.40
  6. Step 6: Final answer
    x = 2,646.74

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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.