Home / 827,005,511.80-1,240,508,267.70-639,752,275.45

Finding the Fourth Proportional to 827,005,511.80, 1,240,508,267.70 and 639,752,275.45

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Solution

The fourth proportional to 827,005,511.80, 1,240,508,267.70 and 639,752,275.45 is: 959,628,413.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,005,511.80 : 1,240,508,267.70 = 639,752,275.45 : x
  2. Step 2: Convert to fraction form
    827,005,511.80/1,240,508,267.70 = 639,752,275.45/x
  3. Step 3: Cross multiply
    827,005,511.80x = 1,240,508,267.70 × 639,752,275.45
  4. Step 4: Simplify right side
    827,005,511.80x = 793,617,986,975,612,800
  5. Step 5: Solve for x
    x = 793,617,986,975,612,800/827,005,511.80
  6. Step 6: Final answer
    x = 959,628,413.18

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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.