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Finding the Fourth Proportional to 258,578,998.80, 387,868,498.20 and 258,578,998.80

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Solution

The fourth proportional to 258,578,998.80, 387,868,498.20 and 258,578,998.80 is: 387,868,498.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,578,998.80 : 387,868,498.20 = 258,578,998.80 : x
  2. Step 2: Convert to fraction form
    258,578,998.80/387,868,498.20 = 258,578,998.80/x
  3. Step 3: Cross multiply
    258,578,998.80x = 387,868,498.20 × 258,578,998.80
  4. Step 4: Simplify right side
    258,578,998.80x = 100,294,647,930,615,600
  5. Step 5: Solve for x
    x = 100,294,647,930,615,600/258,578,998.80
  6. Step 6: Final answer
    x = 387,868,498.20

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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.