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Finding the Fourth Proportional to 2,479.92, 3,720.54 and 1,245.84

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Solution

The fourth proportional to 2,479.92, 3,720.54 and 1,245.84 is: 1,869.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,479.92 : 3,720.54 = 1,245.84 : x
  2. Step 2: Convert to fraction form
    2,479.92/3,720.54 = 1,245.84/x
  3. Step 3: Cross multiply
    2,479.92x = 3,720.54 × 1,245.84
  4. Step 4: Simplify right side
    2,479.92x = 4,635,197.55
  5. Step 5: Solve for x
    x = 4,635,197.55/2,479.92
  6. Step 6: Final answer
    x = 1,869.09

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1.5x scale

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.