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Finding the Fourth Proportional to 1,660.78, 2,291.84 and 914.73

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Solution

The fourth proportional to 1,660.78, 2,291.84 and 914.73 is: 1,262.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,660.78 : 2,291.84 = 914.73 : x
  2. Step 2: Convert to fraction form
    1,660.78/2,291.84 = 914.73/x
  3. Step 3: Cross multiply
    1,660.78x = 2,291.84 × 914.73
  4. Step 4: Simplify right side
    1,660.78x = 2,096,414.80
  5. Step 5: Solve for x
    x = 2,096,414.80/1,660.78
  6. Step 6: Final answer
    x = 1,262.31

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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.