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Finding the Fourth Proportional to 2,723.88, 4,085.88 and 1,081.20

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Solution

The fourth proportional to 2,723.88, 4,085.88 and 1,081.20 is: 1,621.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,723.88 : 4,085.88 = 1,081.20 : x
  2. Step 2: Convert to fraction form
    2,723.88/4,085.88 = 1,081.20/x
  3. Step 3: Cross multiply
    2,723.88x = 4,085.88 × 1,081.20
  4. Step 4: Simplify right side
    2,723.88x = 4,417,653.46
  5. Step 5: Solve for x
    x = 4,417,653.46/2,723.88
  6. Step 6: Final answer
    x = 1,621.82

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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.