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Finding the Fourth Proportional to 2,179.20, 3,007.20 and 1,234.92

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Solution

The fourth proportional to 2,179.20, 3,007.20 and 1,234.92 is: 1,704.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.20 : 3,007.20 = 1,234.92 : x
  2. Step 2: Convert to fraction form
    2,179.20/3,007.20 = 1,234.92/x
  3. Step 3: Cross multiply
    2,179.20x = 3,007.20 × 1,234.92
  4. Step 4: Simplify right side
    2,179.20x = 3,713,651.42
  5. Step 5: Solve for x
    x = 3,713,651.42/2,179.20
  6. Step 6: Final answer
    x = 1,704.14

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1.5x scale

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.