Home / 3,279.40-4,921.13-1,331.62

Finding the Fourth Proportional to 3,279.40, 4,921.13 and 1,331.62

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Solution

The fourth proportional to 3,279.40, 4,921.13 and 1,331.62 is: 1,998.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,279.40 : 4,921.13 = 1,331.62 : x
  2. Step 2: Convert to fraction form
    3,279.40/4,921.13 = 1,331.62/x
  3. Step 3: Cross multiply
    3,279.40x = 4,921.13 × 1,331.62
  4. Step 4: Simplify right side
    3,279.40x = 6,553,075.13
  5. Step 5: Solve for x
    x = 6,553,075.13/3,279.40
  6. Step 6: Final answer
    x = 1,998.25

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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.