Home / 809,511,976.51-1,117,126,901.35-438,234,007.89

Finding the Fourth Proportional to 809,511,976.51, 1,117,126,901.35 and 438,234,007.89

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Solution

The fourth proportional to 809,511,976.51, 1,117,126,901.35 and 438,234,007.89 is: 604,763,133.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,511,976.51 : 1,117,126,901.35 = 438,234,007.89 : x
  2. Step 2: Convert to fraction form
    809,511,976.51/1,117,126,901.35 = 438,234,007.89/x
  3. Step 3: Cross multiply
    809,511,976.51x = 1,117,126,901.35 × 438,234,007.89
  4. Step 4: Simplify right side
    809,511,976.51x = 489,562,999,300,347,072
  5. Step 5: Solve for x
    x = 489,562,999,300,347,072/809,511,976.51
  6. Step 6: Final answer
    x = 604,763,133.23

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1.5x scale

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.