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Finding the Fourth Proportional to 378,311.60, 567,467.40 and 310,660.40

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Solution

The fourth proportional to 378,311.60, 567,467.40 and 310,660.40 is: 465,990.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,311.60 : 567,467.40 = 310,660.40 : x
  2. Step 2: Convert to fraction form
    378,311.60/567,467.40 = 310,660.40/x
  3. Step 3: Cross multiply
    378,311.60x = 567,467.40 × 310,660.40
  4. Step 4: Simplify right side
    378,311.60x = 176,289,649,470.96
  5. Step 5: Solve for x
    x = 176,289,649,470.96/378,311.60
  6. Step 6: Final answer
    x = 465,990.60

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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.