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Finding the Fourth Proportional to 221,427.10, 332,140.65 and 200,431.90

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Solution

The fourth proportional to 221,427.10, 332,140.65 and 200,431.90 is: 300,647.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,427.10 : 332,140.65 = 200,431.90 : x
  2. Step 2: Convert to fraction form
    221,427.10/332,140.65 = 200,431.90/x
  3. Step 3: Cross multiply
    221,427.10x = 332,140.65 × 200,431.90
  4. Step 4: Simplify right side
    221,427.10x = 66,571,581,546.74
  5. Step 5: Solve for x
    x = 66,571,581,546.74/221,427.10
  6. Step 6: Final answer
    x = 300,647.85

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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.