Home / 427,310,081.20-640,965,121.80-398,644,634.80

Finding the Fourth Proportional to 427,310,081.20, 640,965,121.80 and 398,644,634.80

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Solution

The fourth proportional to 427,310,081.20, 640,965,121.80 and 398,644,634.80 is: 597,966,952.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,310,081.20 : 640,965,121.80 = 398,644,634.80 : x
  2. Step 2: Convert to fraction form
    427,310,081.20/640,965,121.80 = 398,644,634.80/x
  3. Step 3: Cross multiply
    427,310,081.20x = 640,965,121.80 × 398,644,634.80
  4. Step 4: Simplify right side
    427,310,081.20x = 255,517,306,899,498,496
  5. Step 5: Solve for x
    x = 255,517,306,899,498,496/427,310,081.20
  6. Step 6: Final answer
    x = 597,966,952.20

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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.