Home / 2,207.45-3,311.18-821.13

Finding the Fourth Proportional to 2,207.45, 3,311.18 and 821.13

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Solution

The fourth proportional to 2,207.45, 3,311.18 and 821.13 is: 1,231.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,207.45 : 3,311.18 = 821.13 : x
  2. Step 2: Convert to fraction form
    2,207.45/3,311.18 = 821.13/x
  3. Step 3: Cross multiply
    2,207.45x = 3,311.18 × 821.13
  4. Step 4: Simplify right side
    2,207.45x = 2,718,917.54
  5. Step 5: Solve for x
    x = 2,718,917.54/2,207.45
  6. Step 6: Final answer
    x = 1,231.70

Related Problems

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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.