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Finding the Fourth Proportional to 339,885.24, 509,529.78 and 129,383.16

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Solution

The fourth proportional to 339,885.24, 509,529.78 and 129,383.16 is: 193,961.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,885.24 : 509,529.78 = 129,383.16 : x
  2. Step 2: Convert to fraction form
    339,885.24/509,529.78 = 129,383.16/x
  3. Step 3: Cross multiply
    339,885.24x = 509,529.78 × 129,383.16
  4. Step 4: Simplify right side
    339,885.24x = 65,924,573,050.50
  5. Step 5: Solve for x
    x = 65,924,573,050.50/339,885.24
  6. Step 6: Final answer
    x = 193,961.27

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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.