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Finding the Fourth Proportional to 326,089.70, 489,134.55 and 231,611.30

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Solution

The fourth proportional to 326,089.70, 489,134.55 and 231,611.30 is: 347,416.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,089.70 : 489,134.55 = 231,611.30 : x
  2. Step 2: Convert to fraction form
    326,089.70/489,134.55 = 231,611.30/x
  3. Step 3: Cross multiply
    326,089.70x = 489,134.55 × 231,611.30
  4. Step 4: Simplify right side
    326,089.70x = 113,289,089,000.42
  5. Step 5: Solve for x
    x = 113,289,089,000.42/326,089.70
  6. Step 6: Final answer
    x = 347,416.95

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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.