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Finding the Fourth Proportional to 639,843,612.60, 959,765,418.90 and 565,867,025.40

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Solution

The fourth proportional to 639,843,612.60, 959,765,418.90 and 565,867,025.40 is: 848,800,538.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,843,612.60 : 959,765,418.90 = 565,867,025.40 : x
  2. Step 2: Convert to fraction form
    639,843,612.60/959,765,418.90 = 565,867,025.40/x
  3. Step 3: Cross multiply
    639,843,612.60x = 959,765,418.90 × 565,867,025.40
  4. Step 4: Simplify right side
    639,843,612.60x = 543,099,602,674,727,872
  5. Step 5: Solve for x
    x = 543,099,602,674,727,872/639,843,612.60
  6. Step 6: Final answer
    x = 848,800,538.10

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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.