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Finding the Fourth Proportional to 2,008.78, 3,012.05 and 621.73

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Solution

The fourth proportional to 2,008.78, 3,012.05 and 621.73 is: 932.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,008.78 : 3,012.05 = 621.73 : x
  2. Step 2: Convert to fraction form
    2,008.78/3,012.05 = 621.73/x
  3. Step 3: Cross multiply
    2,008.78x = 3,012.05 × 621.73
  4. Step 4: Simplify right side
    2,008.78x = 1,872,663.68
  5. Step 5: Solve for x
    x = 1,872,663.68/2,008.78
  6. Step 6: Final answer
    x = 932.24

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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.