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Finding the Fourth Proportional to 1,422.52, 2,135.73 and 729.73

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Solution

The fourth proportional to 1,422.52, 2,135.73 and 729.73 is: 1,095.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.52 : 2,135.73 = 729.73 : x
  2. Step 2: Convert to fraction form
    1,422.52/2,135.73 = 729.73/x
  3. Step 3: Cross multiply
    1,422.52x = 2,135.73 × 729.73
  4. Step 4: Simplify right side
    1,422.52x = 1,558,506.25
  5. Step 5: Solve for x
    x = 1,558,506.25/1,422.52
  6. Step 6: Final answer
    x = 1,095.60

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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.