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Finding the Fourth Proportional to 303,500.28, 455,133.78 and 209,721.72

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Solution

The fourth proportional to 303,500.28, 455,133.78 and 209,721.72 is: 314,501.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,500.28 : 455,133.78 = 209,721.72 : x
  2. Step 2: Convert to fraction form
    303,500.28/455,133.78 = 209,721.72/x
  3. Step 3: Cross multiply
    303,500.28x = 455,133.78 × 209,721.72
  4. Step 4: Simplify right side
    303,500.28x = 95,451,439,171.70
  5. Step 5: Solve for x
    x = 95,451,439,171.70/303,500.28
  6. Step 6: Final answer
    x = 314,501.98

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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.