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Finding the Fourth Proportional to 279,676,871.70, 419,515,307.55 and 221,856,090.90

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Solution

The fourth proportional to 279,676,871.70, 419,515,307.55 and 221,856,090.90 is: 332,784,136.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,676,871.70 : 419,515,307.55 = 221,856,090.90 : x
  2. Step 2: Convert to fraction form
    279,676,871.70/419,515,307.55 = 221,856,090.90/x
  3. Step 3: Cross multiply
    279,676,871.70x = 419,515,307.55 × 221,856,090.90
  4. Step 4: Simplify right side
    279,676,871.70x = 93,072,026,205,754,256
  5. Step 5: Solve for x
    x = 93,072,026,205,754,256/279,676,871.70
  6. Step 6: Final answer
    x = 332,784,136.35

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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.