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Finding the Fourth Proportional to 303,399.20, 455,098.80 and 163,431.20

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Solution

The fourth proportional to 303,399.20, 455,098.80 and 163,431.20 is: 245,146.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,399.20 : 455,098.80 = 163,431.20 : x
  2. Step 2: Convert to fraction form
    303,399.20/455,098.80 = 163,431.20/x
  3. Step 3: Cross multiply
    303,399.20x = 455,098.80 × 163,431.20
  4. Step 4: Simplify right side
    303,399.20x = 74,377,343,002.56
  5. Step 5: Solve for x
    x = 74,377,343,002.56/303,399.20
  6. Step 6: Final answer
    x = 245,146.80

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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.