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Finding the Fourth Proportional to 647,481.13, 971,310.39 and 220,902.53

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Solution

The fourth proportional to 647,481.13, 971,310.39 and 220,902.53 is: 331,384.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,481.13 : 971,310.39 = 220,902.53 : x
  2. Step 2: Convert to fraction form
    647,481.13/971,310.39 = 220,902.53/x
  3. Step 3: Cross multiply
    647,481.13x = 971,310.39 × 220,902.53
  4. Step 4: Simplify right side
    647,481.13x = 214,564,917,709.74
  5. Step 5: Solve for x
    x = 214,564,917,709.74/647,481.13
  6. Step 6: Final answer
    x = 331,384.05

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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.