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Finding the Fourth Proportional to 221,421.20, 332,131.80 and 63,640.40

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Solution

The fourth proportional to 221,421.20, 332,131.80 and 63,640.40 is: 95,460.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,421.20 : 332,131.80 = 63,640.40 : x
  2. Step 2: Convert to fraction form
    221,421.20/332,131.80 = 63,640.40/x
  3. Step 3: Cross multiply
    221,421.20x = 332,131.80 × 63,640.40
  4. Step 4: Simplify right side
    221,421.20x = 21,137,000,604.72
  5. Step 5: Solve for x
    x = 21,137,000,604.72/221,421.20
  6. Step 6: Final answer
    x = 95,460.60

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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.