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Finding the Fourth Proportional to 220,428.99, 330,737.10 and 120,472.40

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Solution

The fourth proportional to 220,428.99, 330,737.10 and 120,472.40 is: 180,759.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,428.99 : 330,737.10 = 120,472.40 : x
  2. Step 2: Convert to fraction form
    220,428.99/330,737.10 = 120,472.40/x
  3. Step 3: Cross multiply
    220,428.99x = 330,737.10 × 120,472.40
  4. Step 4: Simplify right side
    220,428.99x = 39,844,689,949.99
  5. Step 5: Solve for x
    x = 39,844,689,949.99/220,428.99
  6. Step 6: Final answer
    x = 180,759.76

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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.