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Finding the Fourth Proportional to 328,061.60, 491,785.20 and 256,944.80

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Solution

The fourth proportional to 328,061.60, 491,785.20 and 256,944.80 is: 385,176.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,061.60 : 491,785.20 = 256,944.80 : x
  2. Step 2: Convert to fraction form
    328,061.60/491,785.20 = 256,944.80/x
  3. Step 3: Cross multiply
    328,061.60x = 491,785.20 × 256,944.80
  4. Step 4: Simplify right side
    328,061.60x = 126,361,649,856.96
  5. Step 5: Solve for x
    x = 126,361,649,856.96/328,061.60
  6. Step 6: Final answer
    x = 385,176.59

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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.