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Finding the Fourth Proportional to 1,609.94, 2,221.42 and 1,020.68

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Solution

The fourth proportional to 1,609.94, 2,221.42 and 1,020.68 is: 1,408.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,609.94 : 2,221.42 = 1,020.68 : x
  2. Step 2: Convert to fraction form
    1,609.94/2,221.42 = 1,020.68/x
  3. Step 3: Cross multiply
    1,609.94x = 2,221.42 × 1,020.68
  4. Step 4: Simplify right side
    1,609.94x = 2,267,358.97
  5. Step 5: Solve for x
    x = 2,267,358.97/1,609.94
  6. Step 6: Final answer
    x = 1,408.35

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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.