Home / 809,511,986.70-1,117,126,915.36-438,234,018.06

Finding the Fourth Proportional to 809,511,986.70, 1,117,126,915.36 and 438,234,018.06

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Solution

The fourth proportional to 809,511,986.70, 1,117,126,915.36 and 438,234,018.06 is: 604,763,147.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,511,986.70 : 1,117,126,915.36 = 438,234,018.06 : x
  2. Step 2: Convert to fraction form
    809,511,986.70/1,117,126,915.36 = 438,234,018.06/x
  3. Step 3: Cross multiply
    809,511,986.70x = 1,117,126,915.36 × 438,234,018.06
  4. Step 4: Simplify right side
    809,511,986.70x = 489,563,016,801,186,304
  5. Step 5: Solve for x
    x = 489,563,016,801,186,304/809,511,986.70
  6. Step 6: Final answer
    x = 604,763,147.24

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Double scale
Find fourth proportional to 809,511,987.70, 1,117,126,916.74 and 438,234,019.06
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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.