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Finding the Fourth Proportional to 378,712.17, 522,648.41 and 217,631.43

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Solution

The fourth proportional to 378,712.17, 522,648.41 and 217,631.43 is: 300,346.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,712.17 : 522,648.41 = 217,631.43 : x
  2. Step 2: Convert to fraction form
    378,712.17/522,648.41 = 217,631.43/x
  3. Step 3: Cross multiply
    378,712.17x = 522,648.41 × 217,631.43
  4. Step 4: Simplify right side
    378,712.17x = 113,744,719,767.37
  5. Step 5: Solve for x
    x = 113,744,719,767.37/378,712.17
  6. Step 6: Final answer
    x = 300,346.09

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1.5x scale

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.