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Finding the Fourth Proportional to 392,416.40, 587,458.20 and 259,446.80

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Solution

The fourth proportional to 392,416.40, 587,458.20 and 259,446.80 is: 388,399.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,416.40 : 587,458.20 = 259,446.80 : x
  2. Step 2: Convert to fraction form
    392,416.40/587,458.20 = 259,446.80/x
  3. Step 3: Cross multiply
    392,416.40x = 587,458.20 × 259,446.80
  4. Step 4: Simplify right side
    392,416.40x = 152,414,150,123.76
  5. Step 5: Solve for x
    x = 152,414,150,123.76/392,416.40
  6. Step 6: Final answer
    x = 388,399.03

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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.