Home / 3,540.15-5,309.10-1,288.40

Finding the Fourth Proportional to 3,540.15, 5,309.10 and 1,288.40

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Solution

The fourth proportional to 3,540.15, 5,309.10 and 1,288.40 is: 1,932.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,540.15 : 5,309.10 = 1,288.40 : x
  2. Step 2: Convert to fraction form
    3,540.15/5,309.10 = 1,288.40/x
  3. Step 3: Cross multiply
    3,540.15x = 5,309.10 × 1,288.40
  4. Step 4: Simplify right side
    3,540.15x = 6,840,217.89
  5. Step 5: Solve for x
    x = 6,840,217.89/3,540.15
  6. Step 6: Final answer
    x = 1,932.18

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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.