Home / 257,664.11-386,508.29-212,601.87

Finding the Fourth Proportional to 257,664.11, 386,508.29 and 212,601.87

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Solution

The fourth proportional to 257,664.11, 386,508.29 and 212,601.87 is: 318,912.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,664.11 : 386,508.29 = 212,601.87 : x
  2. Step 2: Convert to fraction form
    257,664.11/386,508.29 = 212,601.87/x
  3. Step 3: Cross multiply
    257,664.11x = 386,508.29 × 212,601.87
  4. Step 4: Simplify right side
    257,664.11x = 82,172,384,161.49
  5. Step 5: Solve for x
    x = 82,172,384,161.49/257,664.11
  6. Step 6: Final answer
    x = 318,912.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.