Home / 2,117.60-3,178.43-1,809.80

Finding the Fourth Proportional to 2,117.60, 3,178.43 and 1,809.80

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Solution

The fourth proportional to 2,117.60, 3,178.43 and 1,809.80 is: 2,716.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.60 : 3,178.43 = 1,809.80 : x
  2. Step 2: Convert to fraction form
    2,117.60/3,178.43 = 1,809.80/x
  3. Step 3: Cross multiply
    2,117.60x = 3,178.43 × 1,809.80
  4. Step 4: Simplify right side
    2,117.60x = 5,752,322.61
  5. Step 5: Solve for x
    x = 5,752,322.61/2,117.60
  6. Step 6: Final answer
    x = 2,716.43

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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.