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Finding the Fourth Proportional to 280,229.70, 386,725.51 and 159,388.37

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Solution

The fourth proportional to 280,229.70, 386,725.51 and 159,388.37 is: 219,960.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,229.70 : 386,725.51 = 159,388.37 : x
  2. Step 2: Convert to fraction form
    280,229.70/386,725.51 = 159,388.37/x
  3. Step 3: Cross multiply
    280,229.70x = 386,725.51 × 159,388.37
  4. Step 4: Simplify right side
    280,229.70x = 61,639,548,392.15
  5. Step 5: Solve for x
    x = 61,639,548,392.15/280,229.70
  6. Step 6: Final answer
    x = 219,960.79

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1.5x scale

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.