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Finding the Fourth Proportional to 279,937,872.90, 419,906,809.35 and 254,428,704.90

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Solution

The fourth proportional to 279,937,872.90, 419,906,809.35 and 254,428,704.90 is: 381,643,057.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,937,872.90 : 419,906,809.35 = 254,428,704.90 : x
  2. Step 2: Convert to fraction form
    279,937,872.90/419,906,809.35 = 254,428,704.90/x
  3. Step 3: Cross multiply
    279,937,872.90x = 419,906,809.35 × 254,428,704.90
  4. Step 4: Simplify right side
    279,937,872.90x = 106,836,345,681,611,712
  5. Step 5: Solve for x
    x = 106,836,345,681,611,712/279,937,872.90
  6. Step 6: Final answer
    x = 381,643,057.35

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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.