Home / 3,979.92-5,490-3,234.72

Finding the Fourth Proportional to 3,979.92, 5,490 and 3,234.72

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Solution

The fourth proportional to 3,979.92, 5,490 and 3,234.72 is: 4,462.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.92 : 5,490 = 3,234.72 : x
  2. Step 2: Convert to fraction form
    3,979.92/5,490 = 3,234.72/x
  3. Step 3: Cross multiply
    3,979.92x = 5,490 × 3,234.72
  4. Step 4: Simplify right side
    3,979.92x = 17,758,612.80
  5. Step 5: Solve for x
    x = 17,758,612.80/3,979.92
  6. Step 6: Final answer
    x = 4,462.05

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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.