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Finding the Fourth Proportional to 339,021.52, 508,335.36 and 128,544.64

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Solution

The fourth proportional to 339,021.52, 508,335.36 and 128,544.64 is: 192,742.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,021.52 : 508,335.36 = 128,544.64 : x
  2. Step 2: Convert to fraction form
    339,021.52/508,335.36 = 128,544.64/x
  3. Step 3: Cross multiply
    339,021.52x = 508,335.36 × 128,544.64
  4. Step 4: Simplify right side
    339,021.52x = 65,343,785,850.47
  5. Step 5: Solve for x
    x = 65,343,785,850.47/339,021.52
  6. Step 6: Final answer
    x = 192,742.30

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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.