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Finding the Fourth Proportional to 339,255.20, 508,729.20 and 128,823.20

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Solution

The fourth proportional to 339,255.20, 508,729.20 and 128,823.20 is: 193,176.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,255.20 : 508,729.20 = 128,823.20 : x
  2. Step 2: Convert to fraction form
    339,255.20/508,729.20 = 128,823.20/x
  3. Step 3: Cross multiply
    339,255.20x = 508,729.20 × 128,823.20
  4. Step 4: Simplify right side
    339,255.20x = 65,536,123,477.44
  5. Step 5: Solve for x
    x = 65,536,123,477.44/339,255.20
  6. Step 6: Final answer
    x = 193,176.47

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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.