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Finding the Fourth Proportional to 280,548.70, 421,211.85 and 221,451.10

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Solution

The fourth proportional to 280,548.70, 421,211.85 and 221,451.10 is: 332,483.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,548.70 : 421,211.85 = 221,451.10 : x
  2. Step 2: Convert to fraction form
    280,548.70/421,211.85 = 221,451.10/x
  3. Step 3: Cross multiply
    280,548.70x = 421,211.85 × 221,451.10
  4. Step 4: Simplify right side
    280,548.70x = 93,277,827,515.54
  5. Step 5: Solve for x
    x = 93,277,827,515.54/280,548.70
  6. Step 6: Final answer
    x = 332,483.55

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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.