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Finding the Fourth Proportional to 886,496.78, 1,329,745.18 and 221,648.78

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Solution

The fourth proportional to 886,496.78, 1,329,745.18 and 221,648.78 is: 332,473.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,496.78 : 1,329,745.18 = 221,648.78 : x
  2. Step 2: Convert to fraction form
    886,496.78/1,329,745.18 = 221,648.78/x
  3. Step 3: Cross multiply
    886,496.78x = 1,329,745.18 × 221,648.78
  4. Step 4: Simplify right side
    886,496.78x = 294,736,396,857.88
  5. Step 5: Solve for x
    x = 294,736,396,857.88/886,496.78
  6. Step 6: Final answer
    x = 332,473.17

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Double scale
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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.