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Finding the Fourth Proportional to 2,184, 3,275.20 and 722.72

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Solution

The fourth proportional to 2,184, 3,275.20 and 722.72 is: 1,083.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,184 : 3,275.20 = 722.72 : x
  2. Step 2: Convert to fraction form
    2,184/3,275.20 = 722.72/x
  3. Step 3: Cross multiply
    2,184x = 3,275.20 × 722.72
  4. Step 4: Simplify right side
    2,184x = 2,367,052.54
  5. Step 5: Solve for x
    x = 2,367,052.54/2,184
  6. Step 6: Final answer
    x = 1,083.82

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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.