Home / 663,552,021.20-995,328,031.80-639,365,550.80

Finding the Fourth Proportional to 663,552,021.20, 995,328,031.80 and 639,365,550.80

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Solution

The fourth proportional to 663,552,021.20, 995,328,031.80 and 639,365,550.80 is: 959,048,326.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,552,021.20 : 995,328,031.80 = 639,365,550.80 : x
  2. Step 2: Convert to fraction form
    663,552,021.20/995,328,031.80 = 639,365,550.80/x
  3. Step 3: Cross multiply
    663,552,021.20x = 995,328,031.80 × 639,365,550.80
  4. Step 4: Simplify right side
    663,552,021.20x = 636,378,455,278,486,784
  5. Step 5: Solve for x
    x = 636,378,455,278,486,784/663,552,021.20
  6. Step 6: Final answer
    x = 959,048,326.20

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Double scale
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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.