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Finding the Fourth Proportional to 326,133.70, 489,200.55 and 211,972.30

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Solution

The fourth proportional to 326,133.70, 489,200.55 and 211,972.30 is: 317,958.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,133.70 : 489,200.55 = 211,972.30 : x
  2. Step 2: Convert to fraction form
    326,133.70/489,200.55 = 211,972.30/x
  3. Step 3: Cross multiply
    326,133.70x = 489,200.55 × 211,972.30
  4. Step 4: Simplify right side
    326,133.70x = 103,696,965,744.77
  5. Step 5: Solve for x
    x = 103,696,965,744.77/326,133.70
  6. Step 6: Final answer
    x = 317,958.45

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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.