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Finding the Fourth Proportional to 3,327.75, 4,991.49 and 987.66

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Solution

The fourth proportional to 3,327.75, 4,991.49 and 987.66 is: 1,481.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,327.75 : 4,991.49 = 987.66 : x
  2. Step 2: Convert to fraction form
    3,327.75/4,991.49 = 987.66/x
  3. Step 3: Cross multiply
    3,327.75x = 4,991.49 × 987.66
  4. Step 4: Simplify right side
    3,327.75x = 4,929,895.01
  5. Step 5: Solve for x
    x = 4,929,895.01/3,327.75
  6. Step 6: Final answer
    x = 1,481.45

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1.5x scale

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.