Home / 2,081.50-3,122.25-1,215.21

Finding the Fourth Proportional to 2,081.50, 3,122.25 and 1,215.21

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Solution

The fourth proportional to 2,081.50, 3,122.25 and 1,215.21 is: 1,822.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.50 : 3,122.25 = 1,215.21 : x
  2. Step 2: Convert to fraction form
    2,081.50/3,122.25 = 1,215.21/x
  3. Step 3: Cross multiply
    2,081.50x = 3,122.25 × 1,215.21
  4. Step 4: Simplify right side
    2,081.50x = 3,794,189.42
  5. Step 5: Solve for x
    x = 3,794,189.42/2,081.50
  6. Step 6: Final answer
    x = 1,822.82

Related Problems

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Half scale
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Double scale
Find fourth proportional to 2,082.50, 3,123.75 and 1,216.21
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.