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Finding the Fourth Proportional to 303,408.90, 455,222.70 and 126,043.20

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Solution

The fourth proportional to 303,408.90, 455,222.70 and 126,043.20 is: 189,110.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,408.90 : 455,222.70 = 126,043.20 : x
  2. Step 2: Convert to fraction form
    303,408.90/455,222.70 = 126,043.20/x
  3. Step 3: Cross multiply
    303,408.90x = 455,222.70 × 126,043.20
  4. Step 4: Simplify right side
    303,408.90x = 57,377,725,820.64
  5. Step 5: Solve for x
    x = 57,377,725,820.64/303,408.90
  6. Step 6: Final answer
    x = 189,110.23

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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.