Home / 639,120.78-882,306.24-397,481.22

Finding the Fourth Proportional to 639,120.78, 882,306.24 and 397,481.22

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Solution

The fourth proportional to 639,120.78, 882,306.24 and 397,481.22 is: 548,722.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,120.78 : 882,306.24 = 397,481.22 : x
  2. Step 2: Convert to fraction form
    639,120.78/882,306.24 = 397,481.22/x
  3. Step 3: Cross multiply
    639,120.78x = 882,306.24 × 397,481.22
  4. Step 4: Simplify right side
    639,120.78x = 350,700,160,688.81
  5. Step 5: Solve for x
    x = 350,700,160,688.81/639,120.78
  6. Step 6: Final answer
    x = 548,722.83

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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.