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Finding the Fourth Proportional to 228,041.20, 342,061.80 and 221,480.20

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Solution

The fourth proportional to 228,041.20, 342,061.80 and 221,480.20 is: 332,220.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,041.20 : 342,061.80 = 221,480.20 : x
  2. Step 2: Convert to fraction form
    228,041.20/342,061.80 = 221,480.20/x
  3. Step 3: Cross multiply
    228,041.20x = 342,061.80 × 221,480.20
  4. Step 4: Simplify right side
    228,041.20x = 75,759,915,876.36
  5. Step 5: Solve for x
    x = 75,759,915,876.36/228,041.20
  6. Step 6: Final answer
    x = 332,220.30

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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.