Home / 2,166.40-3,247.80-1,140.40

Finding the Fourth Proportional to 2,166.40, 3,247.80 and 1,140.40

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Solution

The fourth proportional to 2,166.40, 3,247.80 and 1,140.40 is: 1,709.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,166.40 : 3,247.80 = 1,140.40 : x
  2. Step 2: Convert to fraction form
    2,166.40/3,247.80 = 1,140.40/x
  3. Step 3: Cross multiply
    2,166.40x = 3,247.80 × 1,140.40
  4. Step 4: Simplify right side
    2,166.40x = 3,703,791.12
  5. Step 5: Solve for x
    x = 3,703,791.12/2,166.40
  6. Step 6: Final answer
    x = 1,709.65

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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.