Home / 287,105.83-396,202.18-159,781.39

Finding the Fourth Proportional to 287,105.83, 396,202.18 and 159,781.39

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Solution

The fourth proportional to 287,105.83, 396,202.18 and 159,781.39 is: 220,496.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,105.83 : 396,202.18 = 159,781.39 : x
  2. Step 2: Convert to fraction form
    287,105.83/396,202.18 = 159,781.39/x
  3. Step 3: Cross multiply
    287,105.83x = 396,202.18 × 159,781.39
  4. Step 4: Simplify right side
    287,105.83x = 63,305,735,041.43
  5. Step 5: Solve for x
    x = 63,305,735,041.43/287,105.83
  6. Step 6: Final answer
    x = 220,496.17

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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.