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Finding the Fourth Proportional to 639,772,959.83, 959,659,439.74 and 639,772,959.83

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Solution

The fourth proportional to 639,772,959.83, 959,659,439.74 and 639,772,959.83 is: 959,659,439.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,772,959.83 : 959,659,439.74 = 639,772,959.83 : x
  2. Step 2: Convert to fraction form
    639,772,959.83/959,659,439.74 = 639,772,959.83/x
  3. Step 3: Cross multiply
    639,772,959.83x = 959,659,439.74 × 639,772,959.83
  4. Step 4: Simplify right side
    639,772,959.83x = 613,964,160,184,861,568
  5. Step 5: Solve for x
    x = 613,964,160,184,861,568/639,772,959.83
  6. Step 6: Final answer
    x = 959,659,439.74

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Half scale
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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.