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Finding the Fourth Proportional to 303,438.90, 455,267.70 and 126,073.20

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Solution

The fourth proportional to 303,438.90, 455,267.70 and 126,073.20 is: 189,155.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,438.90 : 455,267.70 = 126,073.20 : x
  2. Step 2: Convert to fraction form
    303,438.90/455,267.70 = 126,073.20/x
  3. Step 3: Cross multiply
    303,438.90x = 455,267.70 × 126,073.20
  4. Step 4: Simplify right side
    303,438.90x = 57,397,055,795.64
  5. Step 5: Solve for x
    x = 57,397,055,795.64/303,438.90
  6. Step 6: Final answer
    x = 189,155.23

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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.