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Finding the Fourth Proportional to 2,083.60, 3,125.85 and 622.90

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Solution

The fourth proportional to 2,083.60, 3,125.85 and 622.90 is: 934.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,083.60 : 3,125.85 = 622.90 : x
  2. Step 2: Convert to fraction form
    2,083.60/3,125.85 = 622.90/x
  3. Step 3: Cross multiply
    2,083.60x = 3,125.85 × 622.90
  4. Step 4: Simplify right side
    2,083.60x = 1,947,091.97
  5. Step 5: Solve for x
    x = 1,947,091.97/2,083.60
  6. Step 6: Final answer
    x = 934.48

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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.