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Finding the Fourth Proportional to 2,422.40, 3,633.48 and 861.92

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Solution

The fourth proportional to 2,422.40, 3,633.48 and 861.92 is: 1,292.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,422.40 : 3,633.48 = 861.92 : x
  2. Step 2: Convert to fraction form
    2,422.40/3,633.48 = 861.92/x
  3. Step 3: Cross multiply
    2,422.40x = 3,633.48 × 861.92
  4. Step 4: Simplify right side
    2,422.40x = 3,131,769.08
  5. Step 5: Solve for x
    x = 3,131,769.08/2,422.40
  6. Step 6: Final answer
    x = 1,292.84

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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.