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Finding the Fourth Proportional to 640,979,469.20, 961,469,203.80 and 634,177,024.40

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Solution

The fourth proportional to 640,979,469.20, 961,469,203.80 and 634,177,024.40 is: 951,265,536.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,979,469.20 : 961,469,203.80 = 634,177,024.40 : x
  2. Step 2: Convert to fraction form
    640,979,469.20/961,469,203.80 = 634,177,024.40/x
  3. Step 3: Cross multiply
    640,979,469.20x = 961,469,203.80 × 634,177,024.40
  4. Step 4: Simplify right side
    640,979,469.20x = 609,741,678,718,121,088
  5. Step 5: Solve for x
    x = 609,741,678,718,121,088/640,979,469.20
  6. Step 6: Final answer
    x = 951,265,536.60

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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.