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Finding the Fourth Proportional to 1,517.94, 2,276.93 and 422.29

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Solution

The fourth proportional to 1,517.94, 2,276.93 and 422.29 is: 633.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,517.94 : 2,276.93 = 422.29 : x
  2. Step 2: Convert to fraction form
    1,517.94/2,276.93 = 422.29/x
  3. Step 3: Cross multiply
    1,517.94x = 2,276.93 × 422.29
  4. Step 4: Simplify right side
    1,517.94x = 961,528.67
  5. Step 5: Solve for x
    x = 961,528.67/1,517.94
  6. Step 6: Final answer
    x = 633.44

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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.