Home / 1,422.33-1,961.40-1,283.88

Finding the Fourth Proportional to 1,422.33, 1,961.40 and 1,283.88

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Solution

The fourth proportional to 1,422.33, 1,961.40 and 1,283.88 is: 1,770.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.33 : 1,961.40 = 1,283.88 : x
  2. Step 2: Convert to fraction form
    1,422.33/1,961.40 = 1,283.88/x
  3. Step 3: Cross multiply
    1,422.33x = 1,961.40 × 1,283.88
  4. Step 4: Simplify right side
    1,422.33x = 2,518,202.23
  5. Step 5: Solve for x
    x = 2,518,202.23/1,422.33
  6. Step 6: Final answer
    x = 1,770.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.