Home / 1,609.11-2,220.58-945.96

Finding the Fourth Proportional to 1,609.11, 2,220.58 and 945.96

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Solution

The fourth proportional to 1,609.11, 2,220.58 and 945.96 is: 1,305.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,609.11 : 2,220.58 = 945.96 : x
  2. Step 2: Convert to fraction form
    1,609.11/2,220.58 = 945.96/x
  3. Step 3: Cross multiply
    1,609.11x = 2,220.58 × 945.96
  4. Step 4: Simplify right side
    1,609.11x = 2,100,579.86
  5. Step 5: Solve for x
    x = 2,100,579.86/1,609.11
  6. Step 6: Final answer
    x = 1,305.43

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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.