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Finding the Fourth Proportional to 339,163.30, 508,816.91 and 128,796.58

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Solution

The fourth proportional to 339,163.30, 508,816.91 and 128,796.58 is: 193,222.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,163.30 : 508,816.91 = 128,796.58 : x
  2. Step 2: Convert to fraction form
    339,163.30/508,816.91 = 128,796.58/x
  3. Step 3: Cross multiply
    339,163.30x = 508,816.91 × 128,796.58
  4. Step 4: Simplify right side
    339,163.30x = 65,533,877,854.17
  5. Step 5: Solve for x
    x = 65,533,877,854.17/339,163.30
  6. Step 6: Final answer
    x = 193,222.20

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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.