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Finding the Fourth Proportional to 639,738,612.30, 959,607,918.45 and 417,808,850.70

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Solution

The fourth proportional to 639,738,612.30, 959,607,918.45 and 417,808,850.70 is: 626,713,276.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,738,612.30 : 959,607,918.45 = 417,808,850.70 : x
  2. Step 2: Convert to fraction form
    639,738,612.30/959,607,918.45 = 417,808,850.70/x
  3. Step 3: Cross multiply
    639,738,612.30x = 959,607,918.45 × 417,808,850.70
  4. Step 4: Simplify right side
    639,738,612.30x = 400,932,681,530,213,824
  5. Step 5: Solve for x
    x = 400,932,681,530,213,824/639,738,612.30
  6. Step 6: Final answer
    x = 626,713,276.05

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Double scale
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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.