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Finding the Fourth Proportional to 220,428.09, 330,735.76 and 120,471.52

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Solution

The fourth proportional to 220,428.09, 330,735.76 and 120,471.52 is: 180,758.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,428.09 : 330,735.76 = 120,471.52 : x
  2. Step 2: Convert to fraction form
    220,428.09/330,735.76 = 120,471.52/x
  3. Step 3: Cross multiply
    220,428.09x = 330,735.76 × 120,471.52
  4. Step 4: Simplify right side
    220,428.09x = 39,844,239,725.56
  5. Step 5: Solve for x
    x = 39,844,239,725.56/220,428.09
  6. Step 6: Final answer
    x = 180,758.45

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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.