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Finding the Fourth Proportional to 303,428.40, 455,251.95 and 126,062.70

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Solution

The fourth proportional to 303,428.40, 455,251.95 and 126,062.70 is: 189,139.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,428.40 : 455,251.95 = 126,062.70 : x
  2. Step 2: Convert to fraction form
    303,428.40/455,251.95 = 126,062.70/x
  3. Step 3: Cross multiply
    303,428.40x = 455,251.95 × 126,062.70
  4. Step 4: Simplify right side
    303,428.40x = 57,390,289,997.27
  5. Step 5: Solve for x
    x = 57,390,289,997.27/303,428.40
  6. Step 6: Final answer
    x = 189,139.48

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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.