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Finding the Fourth Proportional to 521,338.40, 782,007.60 and 221,743.70

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Solution

The fourth proportional to 521,338.40, 782,007.60 and 221,743.70 is: 332,615.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,338.40 : 782,007.60 = 221,743.70 : x
  2. Step 2: Convert to fraction form
    521,338.40/782,007.60 = 221,743.70/x
  3. Step 3: Cross multiply
    521,338.40x = 782,007.60 × 221,743.70
  4. Step 4: Simplify right side
    521,338.40x = 173,405,258,652.12
  5. Step 5: Solve for x
    x = 173,405,258,652.12/521,338.40
  6. Step 6: Final answer
    x = 332,615.55

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Similar ratio
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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.