Home / 3,327.19-4,991.76-987.20

Finding the Fourth Proportional to 3,327.19, 4,991.76 and 987.20

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Solution

The fourth proportional to 3,327.19, 4,991.76 and 987.20 is: 1,481.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,327.19 : 4,991.76 = 987.20 : x
  2. Step 2: Convert to fraction form
    3,327.19/4,991.76 = 987.20/x
  3. Step 3: Cross multiply
    3,327.19x = 4,991.76 × 987.20
  4. Step 4: Simplify right side
    3,327.19x = 4,927,859.23
  5. Step 5: Solve for x
    x = 4,927,859.23/3,327.19
  6. Step 6: Final answer
    x = 1,481.09

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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.