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Finding the Fourth Proportional to 299,920.80, 449,535.60 and 122,311.20

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Solution

The fourth proportional to 299,920.80, 449,535.60 and 122,311.20 is: 183,325.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,920.80 : 449,535.60 = 122,311.20 : x
  2. Step 2: Convert to fraction form
    299,920.80/449,535.60 = 122,311.20/x
  3. Step 3: Cross multiply
    299,920.80x = 449,535.60 × 122,311.20
  4. Step 4: Simplify right side
    299,920.80x = 54,983,238,678.72
  5. Step 5: Solve for x
    x = 54,983,238,678.72/299,920.80
  6. Step 6: Final answer
    x = 183,325.86

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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.