Home / 220,921.40-331,382.10-203,814.20

Finding the Fourth Proportional to 220,921.40, 331,382.10 and 203,814.20

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Solution

The fourth proportional to 220,921.40, 331,382.10 and 203,814.20 is: 305,721.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,921.40 : 331,382.10 = 203,814.20 : x
  2. Step 2: Convert to fraction form
    220,921.40/331,382.10 = 203,814.20/x
  3. Step 3: Cross multiply
    220,921.40x = 331,382.10 × 203,814.20
  4. Step 4: Simplify right side
    220,921.40x = 67,540,377,605.82
  5. Step 5: Solve for x
    x = 67,540,377,605.82/220,921.40
  6. Step 6: Final answer
    x = 305,721.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.