Home / 1,388.06-2,080.28-1,240.95

Finding the Fourth Proportional to 1,388.06, 2,080.28 and 1,240.95

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Solution

The fourth proportional to 1,388.06, 2,080.28 and 1,240.95 is: 1,859.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388.06 : 2,080.28 = 1,240.95 : x
  2. Step 2: Convert to fraction form
    1,388.06/2,080.28 = 1,240.95/x
  3. Step 3: Cross multiply
    1,388.06x = 2,080.28 × 1,240.95
  4. Step 4: Simplify right side
    1,388.06x = 2,581,517.26
  5. Step 5: Solve for x
    x = 2,581,517.26/1,388.06
  6. Step 6: Final answer
    x = 1,859.81

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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.