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Finding the Fourth Proportional to 766,946,040.40, 1,150,419,060.60 and 639,400,200.40

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Solution

The fourth proportional to 766,946,040.40, 1,150,419,060.60 and 639,400,200.40 is: 959,100,300.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    766,946,040.40 : 1,150,419,060.60 = 639,400,200.40 : x
  2. Step 2: Convert to fraction form
    766,946,040.40/1,150,419,060.60 = 639,400,200.40/x
  3. Step 3: Cross multiply
    766,946,040.40x = 1,150,419,060.60 × 639,400,200.40
  4. Step 4: Simplify right side
    766,946,040.40x = 735,578,177,891,619,712
  5. Step 5: Solve for x
    x = 735,578,177,891,619,712/766,946,040.40
  6. Step 6: Final answer
    x = 959,100,300.60

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Double scale
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Similar ratio
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1.5x scale

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.