Home / 2,140.80-3,207.02-1,908.60

Finding the Fourth Proportional to 2,140.80, 3,207.02 and 1,908.60

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Solution

The fourth proportional to 2,140.80, 3,207.02 and 1,908.60 is: 2,859.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.80 : 3,207.02 = 1,908.60 : x
  2. Step 2: Convert to fraction form
    2,140.80/3,207.02 = 1,908.60/x
  3. Step 3: Cross multiply
    2,140.80x = 3,207.02 × 1,908.60
  4. Step 4: Simplify right side
    2,140.80x = 6,120,908.83
  5. Step 5: Solve for x
    x = 6,120,908.83/2,140.80
  6. Step 6: Final answer
    x = 2,859.17

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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.