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Finding the Fourth Proportional to 378,487.68, 522,289.11 and 217,229.22

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Solution

The fourth proportional to 378,487.68, 522,289.11 and 217,229.22 is: 299,762.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,487.68 : 522,289.11 = 217,229.22 : x
  2. Step 2: Convert to fraction form
    378,487.68/522,289.11 = 217,229.22/x
  3. Step 3: Cross multiply
    378,487.68x = 522,289.11 × 217,229.22
  4. Step 4: Simplify right side
    378,487.68x = 113,456,455,979.79
  5. Step 5: Solve for x
    x = 113,456,455,979.79/378,487.68
  6. Step 6: Final answer
    x = 299,762.61

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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.