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Finding the Fourth Proportional to 421,463.70, 632,195.55 and 221,706.90

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Solution

The fourth proportional to 421,463.70, 632,195.55 and 221,706.90 is: 332,560.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,463.70 : 632,195.55 = 221,706.90 : x
  2. Step 2: Convert to fraction form
    421,463.70/632,195.55 = 221,706.90/x
  3. Step 3: Cross multiply
    421,463.70x = 632,195.55 × 221,706.90
  4. Step 4: Simplify right side
    421,463.70x = 140,162,115,584.30
  5. Step 5: Solve for x
    x = 140,162,115,584.30/421,463.70
  6. Step 6: Final answer
    x = 332,560.35

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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.