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Finding the Fourth Proportional to 2,422.70, 3,635.55 and 961.70

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Solution

The fourth proportional to 2,422.70, 3,635.55 and 961.70 is: 1,443.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,422.70 : 3,635.55 = 961.70 : x
  2. Step 2: Convert to fraction form
    2,422.70/3,635.55 = 961.70/x
  3. Step 3: Cross multiply
    2,422.70x = 3,635.55 × 961.70
  4. Step 4: Simplify right side
    2,422.70x = 3,496,308.44
  5. Step 5: Solve for x
    x = 3,496,308.44/2,422.70
  6. Step 6: Final answer
    x = 1,443.15

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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.