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Finding the Fourth Proportional to 220,428.45, 330,736.28 and 120,471.86

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Solution

The fourth proportional to 220,428.45, 330,736.28 and 120,471.86 is: 180,758.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,428.45 : 330,736.28 = 120,471.86 : x
  2. Step 2: Convert to fraction form
    220,428.45/330,736.28 = 120,471.86/x
  3. Step 3: Cross multiply
    220,428.45x = 330,736.28 × 120,471.86
  4. Step 4: Simplify right side
    220,428.45x = 39,844,412,565.04
  5. Step 5: Solve for x
    x = 39,844,412,565.04/220,428.45
  6. Step 6: Final answer
    x = 180,758.94

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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.