Home / 485,568,220.80-728,352,331.20-429,448,051.20

Finding the Fourth Proportional to 485,568,220.80, 728,352,331.20 and 429,448,051.20

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Solution

The fourth proportional to 485,568,220.80, 728,352,331.20 and 429,448,051.20 is: 644,172,076.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,568,220.80 : 728,352,331.20 = 429,448,051.20 : x
  2. Step 2: Convert to fraction form
    485,568,220.80/728,352,331.20 = 429,448,051.20/x
  3. Step 3: Cross multiply
    485,568,220.80x = 728,352,331.20 × 429,448,051.20
  4. Step 4: Simplify right side
    485,568,220.80x = 312,789,489,220,816,960
  5. Step 5: Solve for x
    x = 312,789,489,220,816,960/485,568,220.80
  6. Step 6: Final answer
    x = 644,172,076.80

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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.