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Finding the Fourth Proportional to 221,408.40, 332,112.60 and 209,744.40

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Solution

The fourth proportional to 221,408.40, 332,112.60 and 209,744.40 is: 314,616.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,408.40 : 332,112.60 = 209,744.40 : x
  2. Step 2: Convert to fraction form
    221,408.40/332,112.60 = 209,744.40/x
  3. Step 3: Cross multiply
    221,408.40x = 332,112.60 × 209,744.40
  4. Step 4: Simplify right side
    221,408.40x = 69,658,758,019.44
  5. Step 5: Solve for x
    x = 69,658,758,019.44/221,408.40
  6. Step 6: Final answer
    x = 314,616.60

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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.