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Finding the Fourth Proportional to 378,426.92, 522,304.81 and 217,392.44

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Solution

The fourth proportional to 378,426.92, 522,304.81 and 217,392.44 is: 300,045.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,426.92 : 522,304.81 = 217,392.44 : x
  2. Step 2: Convert to fraction form
    378,426.92/522,304.81 = 217,392.44/x
  3. Step 3: Cross multiply
    378,426.92x = 522,304.81 × 217,392.44
  4. Step 4: Simplify right side
    378,426.92x = 113,545,113,914.63
  5. Step 5: Solve for x
    x = 113,545,113,914.63/378,426.92
  6. Step 6: Final answer
    x = 300,045.03

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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.