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Finding the Fourth Proportional to 422,800.70, 633,535.86 and 326,972.50

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Solution

The fourth proportional to 422,800.70, 633,535.86 and 326,972.50 is: 489,944.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,800.70 : 633,535.86 = 326,972.50 : x
  2. Step 2: Convert to fraction form
    422,800.70/633,535.86 = 326,972.50/x
  3. Step 3: Cross multiply
    422,800.70x = 633,535.86 × 326,972.50
  4. Step 4: Simplify right side
    422,800.70x = 207,148,803,626.16
  5. Step 5: Solve for x
    x = 207,148,803,626.16/422,800.70
  6. Step 6: Final answer
    x = 489,944.33

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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.