Home / 2,639.52-3,952.80-1,815.48

Finding the Fourth Proportional to 2,639.52, 3,952.80 and 1,815.48

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Solution

The fourth proportional to 2,639.52, 3,952.80 and 1,815.48 is: 2,718.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.52 : 3,952.80 = 1,815.48 : x
  2. Step 2: Convert to fraction form
    2,639.52/3,952.80 = 1,815.48/x
  3. Step 3: Cross multiply
    2,639.52x = 3,952.80 × 1,815.48
  4. Step 4: Simplify right side
    2,639.52x = 7,176,229.34
  5. Step 5: Solve for x
    x = 7,176,229.34/2,639.52
  6. Step 6: Final answer
    x = 2,718.76

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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.