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Finding the Fourth Proportional to 1,814.90, 2,722.66 and 660.38

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Solution

The fourth proportional to 1,814.90, 2,722.66 and 660.38 is: 990.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,814.90 : 2,722.66 = 660.38 : x
  2. Step 2: Convert to fraction form
    1,814.90/2,722.66 = 660.38/x
  3. Step 3: Cross multiply
    1,814.90x = 2,722.66 × 660.38
  4. Step 4: Simplify right side
    1,814.90x = 1,797,974.95
  5. Step 5: Solve for x
    x = 1,797,974.95/1,814.90
  6. Step 6: Final answer
    x = 990.68

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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.