Home / 378,919.91-522,872.25-209,143.10

Finding the Fourth Proportional to 378,919.91, 522,872.25 and 209,143.10

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Solution

The fourth proportional to 378,919.91, 522,872.25 and 209,143.10 is: 288,596.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,919.91 : 522,872.25 = 209,143.10 : x
  2. Step 2: Convert to fraction form
    378,919.91/522,872.25 = 209,143.10/x
  3. Step 3: Cross multiply
    378,919.91x = 522,872.25 × 209,143.10
  4. Step 4: Simplify right side
    378,919.91x = 109,355,123,268.98
  5. Step 5: Solve for x
    x = 109,355,123,268.98/378,919.91
  6. Step 6: Final answer
    x = 288,596.93

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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.