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Finding the Fourth Proportional to 620,449.40, 930,674.10 and 221,540.60

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Solution

The fourth proportional to 620,449.40, 930,674.10 and 221,540.60 is: 332,310.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,449.40 : 930,674.10 = 221,540.60 : x
  2. Step 2: Convert to fraction form
    620,449.40/930,674.10 = 221,540.60/x
  3. Step 3: Cross multiply
    620,449.40x = 930,674.10 × 221,540.60
  4. Step 4: Simplify right side
    620,449.40x = 206,182,098,518.46
  5. Step 5: Solve for x
    x = 206,182,098,518.46/620,449.40
  6. Step 6: Final answer
    x = 332,310.90

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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.