Home / 1,609.41-2,221.05-1,215.75

Finding the Fourth Proportional to 1,609.41, 2,221.05 and 1,215.75

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Solution

The fourth proportional to 1,609.41, 2,221.05 and 1,215.75 is: 1,677.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,609.41 : 2,221.05 = 1,215.75 : x
  2. Step 2: Convert to fraction form
    1,609.41/2,221.05 = 1,215.75/x
  3. Step 3: Cross multiply
    1,609.41x = 2,221.05 × 1,215.75
  4. Step 4: Simplify right side
    1,609.41x = 2,700,241.54
  5. Step 5: Solve for x
    x = 2,700,241.54/1,609.41
  6. Step 6: Final answer
    x = 1,677.78

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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.