Home / 442,964,986.20-664,447,479.30-320,520,979.80

Finding the Fourth Proportional to 442,964,986.20, 664,447,479.30 and 320,520,979.80

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Solution

The fourth proportional to 442,964,986.20, 664,447,479.30 and 320,520,979.80 is: 480,781,469.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,964,986.20 : 664,447,479.30 = 320,520,979.80 : x
  2. Step 2: Convert to fraction form
    442,964,986.20/664,447,479.30 = 320,520,979.80/x
  3. Step 3: Cross multiply
    442,964,986.20x = 664,447,479.30 × 320,520,979.80
  4. Step 4: Simplify right side
    442,964,986.20x = 212,969,357,090,876,224
  5. Step 5: Solve for x
    x = 212,969,357,090,876,224/442,964,986.20
  6. Step 6: Final answer
    x = 480,781,469.70

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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.