Home / 378,481.18-522,280.17-217,222.72

Finding the Fourth Proportional to 378,481.18, 522,280.17 and 217,222.72

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Solution

The fourth proportional to 378,481.18, 522,280.17 and 217,222.72 is: 299,753.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,481.18 : 522,280.17 = 217,222.72 : x
  2. Step 2: Convert to fraction form
    378,481.18/522,280.17 = 217,222.72/x
  3. Step 3: Cross multiply
    378,481.18x = 522,280.17 × 217,222.72
  4. Step 4: Simplify right side
    378,481.18x = 113,451,119,129.46
  5. Step 5: Solve for x
    x = 113,451,119,129.46/378,481.18
  6. Step 6: Final answer
    x = 299,753.66

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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.