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Finding the Fourth Proportional to 2,221.21, 3,331.86 and 762.04

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Solution

The fourth proportional to 2,221.21, 3,331.86 and 762.04 is: 1,143.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.21 : 3,331.86 = 762.04 : x
  2. Step 2: Convert to fraction form
    2,221.21/3,331.86 = 762.04/x
  3. Step 3: Cross multiply
    2,221.21x = 3,331.86 × 762.04
  4. Step 4: Simplify right side
    2,221.21x = 2,539,010.59
  5. Step 5: Solve for x
    x = 2,539,010.59/2,221.21
  6. Step 6: Final answer
    x = 1,143.08

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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.