Home / 2,221.50-3,065.63-1,226.75

Finding the Fourth Proportional to 2,221.50, 3,065.63 and 1,226.75

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Solution

The fourth proportional to 2,221.50, 3,065.63 and 1,226.75 is: 1,692.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.50 : 3,065.63 = 1,226.75 : x
  2. Step 2: Convert to fraction form
    2,221.50/3,065.63 = 1,226.75/x
  3. Step 3: Cross multiply
    2,221.50x = 3,065.63 × 1,226.75
  4. Step 4: Simplify right side
    2,221.50x = 3,760,763.13
  5. Step 5: Solve for x
    x = 3,760,763.13/2,221.50
  6. Step 6: Final answer
    x = 1,692.89

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.