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Finding the Fourth Proportional to 2,193.12, 3,289.68 and 732.28

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Solution

The fourth proportional to 2,193.12, 3,289.68 and 732.28 is: 1,098.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,193.12 : 3,289.68 = 732.28 : x
  2. Step 2: Convert to fraction form
    2,193.12/3,289.68 = 732.28/x
  3. Step 3: Cross multiply
    2,193.12x = 3,289.68 × 732.28
  4. Step 4: Simplify right side
    2,193.12x = 2,408,966.87
  5. Step 5: Solve for x
    x = 2,408,966.87/2,193.12
  6. Step 6: Final answer
    x = 1,098.42

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Similar ratio
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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.