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Finding the Fourth Proportional to 1,354.43, 2,028.60 and 825.90

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Solution

The fourth proportional to 1,354.43, 2,028.60 and 825.90 is: 1,236.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,354.43 : 2,028.60 = 825.90 : x
  2. Step 2: Convert to fraction form
    1,354.43/2,028.60 = 825.90/x
  3. Step 3: Cross multiply
    1,354.43x = 2,028.60 × 825.90
  4. Step 4: Simplify right side
    1,354.43x = 1,675,420.74
  5. Step 5: Solve for x
    x = 1,675,420.74/1,354.43
  6. Step 6: Final answer
    x = 1,236.99

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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.