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Finding the Fourth Proportional to 373,912,992, 515,990,422.80 and 208,901,800.80

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Solution

The fourth proportional to 373,912,992, 515,990,422.80 and 208,901,800.80 is: 288,279,174.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,912,992 : 515,990,422.80 = 208,901,800.80 : x
  2. Step 2: Convert to fraction form
    373,912,992/515,990,422.80 = 208,901,800.80/x
  3. Step 3: Cross multiply
    373,912,992x = 515,990,422.80 × 208,901,800.80
  4. Step 4: Simplify right side
    373,912,992x = 107,791,328,518,473,392
  5. Step 5: Solve for x
    x = 107,791,328,518,473,392/373,912,992
  6. Step 6: Final answer
    x = 288,279,174.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.