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Finding the Fourth Proportional to 326,087.80, 489,131.70 and 231,609.40

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Solution

The fourth proportional to 326,087.80, 489,131.70 and 231,609.40 is: 347,414.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,087.80 : 489,131.70 = 231,609.40 : x
  2. Step 2: Convert to fraction form
    326,087.80/489,131.70 = 231,609.40/x
  3. Step 3: Cross multiply
    326,087.80x = 489,131.70 × 231,609.40
  4. Step 4: Simplify right side
    326,087.80x = 113,287,499,557.98
  5. Step 5: Solve for x
    x = 113,287,499,557.98/326,087.80
  6. Step 6: Final answer
    x = 347,414.10

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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.