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Finding the Fourth Proportional to 280,548.20, 421,211.10 and 221,450.60

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Solution

The fourth proportional to 280,548.20, 421,211.10 and 221,450.60 is: 332,482.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,548.20 : 421,211.10 = 221,450.60 : x
  2. Step 2: Convert to fraction form
    280,548.20/421,211.10 = 221,450.60/x
  3. Step 3: Cross multiply
    280,548.20x = 421,211.10 × 221,450.60
  4. Step 4: Simplify right side
    280,548.20x = 93,277,450,821.66
  5. Step 5: Solve for x
    x = 93,277,450,821.66/280,548.20
  6. Step 6: Final answer
    x = 332,482.80

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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.