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Finding the Fourth Proportional to 303,499.28, 455,132.28 and 209,720.72

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Solution

The fourth proportional to 303,499.28, 455,132.28 and 209,720.72 is: 314,500.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,499.28 : 455,132.28 = 209,720.72 : x
  2. Step 2: Convert to fraction form
    303,499.28/455,132.28 = 209,720.72/x
  3. Step 3: Cross multiply
    303,499.28x = 455,132.28 × 209,720.72
  4. Step 4: Simplify right side
    303,499.28x = 95,450,669,456.84
  5. Step 5: Solve for x
    x = 95,450,669,456.84/303,499.28
  6. Step 6: Final answer
    x = 314,500.48

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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.