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Finding the Fourth Proportional to 639,892,289.80, 958,995,679.88 and 270,970,749.89

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Solution

The fourth proportional to 639,892,289.80, 958,995,679.88 and 270,970,749.89 is: 406,099,249.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,892,289.80 : 958,995,679.88 = 270,970,749.89 : x
  2. Step 2: Convert to fraction form
    639,892,289.80/958,995,679.88 = 270,970,749.89/x
  3. Step 3: Cross multiply
    639,892,289.80x = 958,995,679.88 × 270,970,749.89
  4. Step 4: Simplify right side
    639,892,289.80x = 259,859,778,514,236,448
  5. Step 5: Solve for x
    x = 259,859,778,514,236,448/639,892,289.80
  6. Step 6: Final answer
    x = 406,099,249.29

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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.