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Finding the Fourth Proportional to 303,616.20, 455,424.30 and 126,031.80

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Solution

The fourth proportional to 303,616.20, 455,424.30 and 126,031.80 is: 189,047.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,616.20 : 455,424.30 = 126,031.80 : x
  2. Step 2: Convert to fraction form
    303,616.20/455,424.30 = 126,031.80/x
  3. Step 3: Cross multiply
    303,616.20x = 455,424.30 × 126,031.80
  4. Step 4: Simplify right side
    303,616.20x = 57,397,944,292.74
  5. Step 5: Solve for x
    x = 57,397,944,292.74/303,616.20
  6. Step 6: Final answer
    x = 189,047.70

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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.