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Finding the Fourth Proportional to 251,137,425.80, 376,706,138.70 and 217,097,208.20

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Solution

The fourth proportional to 251,137,425.80, 376,706,138.70 and 217,097,208.20 is: 325,645,812.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,137,425.80 : 376,706,138.70 = 217,097,208.20 : x
  2. Step 2: Convert to fraction form
    251,137,425.80/376,706,138.70 = 217,097,208.20/x
  3. Step 3: Cross multiply
    251,137,425.80x = 376,706,138.70 × 217,097,208.20
  4. Step 4: Simplify right side
    251,137,425.80x = 81,781,851,023,571,968
  5. Step 5: Solve for x
    x = 81,781,851,023,571,968/251,137,425.80
  6. Step 6: Final answer
    x = 325,645,812.30

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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.