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Finding the Fourth Proportional to 639,792,067.80, 959,688,101.70 and 530,740,374.60

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Solution

The fourth proportional to 639,792,067.80, 959,688,101.70 and 530,740,374.60 is: 796,110,561.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,792,067.80 : 959,688,101.70 = 530,740,374.60 : x
  2. Step 2: Convert to fraction form
    639,792,067.80/959,688,101.70 = 530,740,374.60/x
  3. Step 3: Cross multiply
    639,792,067.80x = 959,688,101.70 × 530,740,374.60
  4. Step 4: Simplify right side
    639,792,067.80x = 509,345,222,595,420,928
  5. Step 5: Solve for x
    x = 509,345,222,595,420,928/639,792,067.80
  6. Step 6: Final answer
    x = 796,110,561.90

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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.