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Finding the Fourth Proportional to 288,579.97, 398,232.71 and 161,256.61

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Solution

The fourth proportional to 288,579.97, 398,232.71 and 161,256.61 is: 222,529.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,579.97 : 398,232.71 = 161,256.61 : x
  2. Step 2: Convert to fraction form
    288,579.97/398,232.71 = 161,256.61/x
  3. Step 3: Cross multiply
    288,579.97x = 398,232.71 × 161,256.61
  4. Step 4: Simplify right side
    288,579.97x = 64,217,655,217.69
  5. Step 5: Solve for x
    x = 64,217,655,217.69/288,579.97
  6. Step 6: Final answer
    x = 222,529.85

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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.