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Finding the Fourth Proportional to 2,422.79, 3,634.75 and 779.35

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Solution

The fourth proportional to 2,422.79, 3,634.75 and 779.35 is: 1,169.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,422.79 : 3,634.75 = 779.35 : x
  2. Step 2: Convert to fraction form
    2,422.79/3,634.75 = 779.35/x
  3. Step 3: Cross multiply
    2,422.79x = 3,634.75 × 779.35
  4. Step 4: Simplify right side
    2,422.79x = 2,832,728.70
  5. Step 5: Solve for x
    x = 2,832,728.70/2,422.79
  6. Step 6: Final answer
    x = 1,169.20

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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.