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Finding the Fourth Proportional to 2,021.42, 3,029.78 and 925.90

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Solution

The fourth proportional to 2,021.42, 3,029.78 and 925.90 is: 1,387.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,021.42 : 3,029.78 = 925.90 : x
  2. Step 2: Convert to fraction form
    2,021.42/3,029.78 = 925.90/x
  3. Step 3: Cross multiply
    2,021.42x = 3,029.78 × 925.90
  4. Step 4: Simplify right side
    2,021.42x = 2,805,273.30
  5. Step 5: Solve for x
    x = 2,805,273.30/2,021.42
  6. Step 6: Final answer
    x = 1,387.77

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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.