Home / 3,321.10-4,982.31-981.15

Finding the Fourth Proportional to 3,321.10, 4,982.31 and 981.15

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Solution

The fourth proportional to 3,321.10, 4,982.31 and 981.15 is: 1,471.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,321.10 : 4,982.31 = 981.15 : x
  2. Step 2: Convert to fraction form
    3,321.10/4,982.31 = 981.15/x
  3. Step 3: Cross multiply
    3,321.10x = 4,982.31 × 981.15
  4. Step 4: Simplify right side
    3,321.10x = 4,888,363.64
  5. Step 5: Solve for x
    x = 4,888,363.64/3,321.10
  6. Step 6: Final answer
    x = 1,471.91

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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.