Home / 378,943.24-522,945.30-209,173.72

Finding the Fourth Proportional to 378,943.24, 522,945.30 and 209,173.72

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Solution

The fourth proportional to 378,943.24, 522,945.30 and 209,173.72 is: 288,661.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,943.24 : 522,945.30 = 209,173.72 : x
  2. Step 2: Convert to fraction form
    378,943.24/522,945.30 = 209,173.72/x
  3. Step 3: Cross multiply
    378,943.24x = 522,945.30 × 209,173.72
  4. Step 4: Simplify right side
    378,943.24x = 109,386,413,757.52
  5. Step 5: Solve for x
    x = 109,386,413,757.52/378,943.24
  6. Step 6: Final answer
    x = 288,661.74

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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.