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Finding the Fourth Proportional to 326,608.79, 489,787.22 and 126,902.88

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Solution

The fourth proportional to 326,608.79, 489,787.22 and 126,902.88 is: 190,305.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,608.79 : 489,787.22 = 126,902.88 : x
  2. Step 2: Convert to fraction form
    326,608.79/489,787.22 = 126,902.88/x
  3. Step 3: Cross multiply
    326,608.79x = 489,787.22 × 126,902.88
  4. Step 4: Simplify right side
    326,608.79x = 62,155,409,122.45
  5. Step 5: Solve for x
    x = 62,155,409,122.45/326,608.79
  6. Step 6: Final answer
    x = 190,305.38

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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.