Home / 809,511,985.70-1,117,126,913.98-438,234,017.06

Finding the Fourth Proportional to 809,511,985.70, 1,117,126,913.98 and 438,234,017.06

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Solution

The fourth proportional to 809,511,985.70, 1,117,126,913.98 and 438,234,017.06 is: 604,763,145.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,511,985.70 : 1,117,126,913.98 = 438,234,017.06 : x
  2. Step 2: Convert to fraction form
    809,511,985.70/1,117,126,913.98 = 438,234,017.06/x
  3. Step 3: Cross multiply
    809,511,985.70x = 1,117,126,913.98 × 438,234,017.06
  4. Step 4: Simplify right side
    809,511,985.70x = 489,563,015,079,296,512
  5. Step 5: Solve for x
    x = 489,563,015,079,296,512/809,511,985.70
  6. Step 6: Final answer
    x = 604,763,145.86

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Double scale
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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.