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Finding the Fourth Proportional to 379,092.70, 522,721.41 and 309,966.49

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Solution

The fourth proportional to 379,092.70, 522,721.41 and 309,966.49 is: 427,405.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,092.70 : 522,721.41 = 309,966.49 : x
  2. Step 2: Convert to fraction form
    379,092.70/522,721.41 = 309,966.49/x
  3. Step 3: Cross multiply
    379,092.70x = 522,721.41 × 309,966.49
  4. Step 4: Simplify right side
    379,092.70x = 162,026,120,705.55
  5. Step 5: Solve for x
    x = 162,026,120,705.55/379,092.70
  6. Step 6: Final answer
    x = 427,405.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.