Home / 1,839.20-2,536.80-1,140.80

Finding the Fourth Proportional to 1,839.20, 2,536.80 and 1,140.80

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Solution

The fourth proportional to 1,839.20, 2,536.80 and 1,140.80 is: 1,573.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,839.20 : 2,536.80 = 1,140.80 : x
  2. Step 2: Convert to fraction form
    1,839.20/2,536.80 = 1,140.80/x
  3. Step 3: Cross multiply
    1,839.20x = 2,536.80 × 1,140.80
  4. Step 4: Simplify right side
    1,839.20x = 2,893,981.44
  5. Step 5: Solve for x
    x = 2,893,981.44/1,839.20
  6. Step 6: Final answer
    x = 1,573.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.