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Finding the Fourth Proportional to 2,920.75, 4,035.02 and 1,914.85

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Solution

The fourth proportional to 2,920.75, 4,035.02 and 1,914.85 is: 2,645.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920.75 : 4,035.02 = 1,914.85 : x
  2. Step 2: Convert to fraction form
    2,920.75/4,035.02 = 1,914.85/x
  3. Step 3: Cross multiply
    2,920.75x = 4,035.02 × 1,914.85
  4. Step 4: Simplify right side
    2,920.75x = 7,726,458.05
  5. Step 5: Solve for x
    x = 7,726,458.05/2,920.75
  6. Step 6: Final answer
    x = 2,645.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.