Home / 2,712.40-4,068.78-1,326.88

Finding the Fourth Proportional to 2,712.40, 4,068.78 and 1,326.88

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Solution

The fourth proportional to 2,712.40, 4,068.78 and 1,326.88 is: 1,990.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,712.40 : 4,068.78 = 1,326.88 : x
  2. Step 2: Convert to fraction form
    2,712.40/4,068.78 = 1,326.88/x
  3. Step 3: Cross multiply
    2,712.40x = 4,068.78 × 1,326.88
  4. Step 4: Simplify right side
    2,712.40x = 5,398,782.81
  5. Step 5: Solve for x
    x = 5,398,782.81/2,712.40
  6. Step 6: Final answer
    x = 1,990.41

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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.