Home / 3,660.88-5,491.41-1,321.08

Finding the Fourth Proportional to 3,660.88, 5,491.41 and 1,321.08

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Solution

The fourth proportional to 3,660.88, 5,491.41 and 1,321.08 is: 1,981.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,660.88 : 5,491.41 = 1,321.08 : x
  2. Step 2: Convert to fraction form
    3,660.88/5,491.41 = 1,321.08/x
  3. Step 3: Cross multiply
    3,660.88x = 5,491.41 × 1,321.08
  4. Step 4: Simplify right side
    3,660.88x = 7,254,585.32
  5. Step 5: Solve for x
    x = 7,254,585.32/3,660.88
  6. Step 6: Final answer
    x = 1,981.65

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Half scale
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Double scale
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Similar ratio
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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.