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Finding the Fourth Proportional to 3,493.75, 4,821.38 and 1,921.99

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Solution

The fourth proportional to 3,493.75, 4,821.38 and 1,921.99 is: 2,652.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,493.75 : 4,821.38 = 1,921.99 : x
  2. Step 2: Convert to fraction form
    3,493.75/4,821.38 = 1,921.99/x
  3. Step 3: Cross multiply
    3,493.75x = 4,821.38 × 1,921.99
  4. Step 4: Simplify right side
    3,493.75x = 9,266,634.54
  5. Step 5: Solve for x
    x = 9,266,634.54/3,493.75
  6. Step 6: Final answer
    x = 2,652.35

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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.