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Finding the Fourth Proportional to 1,422.62, 2,128.92 and 1,229.89

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Solution

The fourth proportional to 1,422.62, 2,128.92 and 1,229.89 is: 1,840.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.62 : 2,128.92 = 1,229.89 : x
  2. Step 2: Convert to fraction form
    1,422.62/2,128.92 = 1,229.89/x
  3. Step 3: Cross multiply
    1,422.62x = 2,128.92 × 1,229.89
  4. Step 4: Simplify right side
    1,422.62x = 2,618,331.48
  5. Step 5: Solve for x
    x = 2,618,331.48/1,422.62
  6. Step 6: Final answer
    x = 1,840.50

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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.