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Finding the Fourth Proportional to 2,906.87, 4,363.85 and 1,920.53

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Solution

The fourth proportional to 2,906.87, 4,363.85 and 1,920.53 is: 2,883.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,906.87 : 4,363.85 = 1,920.53 : x
  2. Step 2: Convert to fraction form
    2,906.87/4,363.85 = 1,920.53/x
  3. Step 3: Cross multiply
    2,906.87x = 4,363.85 × 1,920.53
  4. Step 4: Simplify right side
    2,906.87x = 8,380,904.84
  5. Step 5: Solve for x
    x = 8,380,904.84/2,906.87
  6. Step 6: Final answer
    x = 2,883.14

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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.