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Finding the Fourth Proportional to 620,632.80, 930,949.20 and 221,286.60

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Solution

The fourth proportional to 620,632.80, 930,949.20 and 221,286.60 is: 331,929.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,632.80 : 930,949.20 = 221,286.60 : x
  2. Step 2: Convert to fraction form
    620,632.80/930,949.20 = 221,286.60/x
  3. Step 3: Cross multiply
    620,632.80x = 930,949.20 × 221,286.60
  4. Step 4: Simplify right side
    620,632.80x = 206,006,583,240.72
  5. Step 5: Solve for x
    x = 206,006,583,240.72/620,632.80
  6. Step 6: Final answer
    x = 331,929.90

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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.