Home / 3,680.80-5,078.64-2,487.98

Finding the Fourth Proportional to 3,680.80, 5,078.64 and 2,487.98

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Solution

The fourth proportional to 3,680.80, 5,078.64 and 2,487.98 is: 3,432.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,680.80 : 5,078.64 = 2,487.98 : x
  2. Step 2: Convert to fraction form
    3,680.80/5,078.64 = 2,487.98/x
  3. Step 3: Cross multiply
    3,680.80x = 5,078.64 × 2,487.98
  4. Step 4: Simplify right side
    3,680.80x = 12,635,529.35
  5. Step 5: Solve for x
    x = 12,635,529.35/3,680.80
  6. Step 6: Final answer
    x = 3,432.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.