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Finding the Fourth Proportional to 280,552.20, 421,217.10 and 221,454.60

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Solution

The fourth proportional to 280,552.20, 421,217.10 and 221,454.60 is: 332,488.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,552.20 : 421,217.10 = 221,454.60 : x
  2. Step 2: Convert to fraction form
    280,552.20/421,217.10 = 221,454.60/x
  3. Step 3: Cross multiply
    280,552.20x = 421,217.10 × 221,454.60
  4. Step 4: Simplify right side
    280,552.20x = 93,280,464,393.66
  5. Step 5: Solve for x
    x = 93,280,464,393.66/280,552.20
  6. Step 6: Final answer
    x = 332,488.80

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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.