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Finding the Fourth Proportional to 339,178.80, 508,768.20 and 102,687.60

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Solution

The fourth proportional to 339,178.80, 508,768.20 and 102,687.60 is: 154,031.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,178.80 : 508,768.20 = 102,687.60 : x
  2. Step 2: Convert to fraction form
    339,178.80/508,768.20 = 102,687.60/x
  3. Step 3: Cross multiply
    339,178.80x = 508,768.20 × 102,687.60
  4. Step 4: Simplify right side
    339,178.80x = 52,244,185,414.32
  5. Step 5: Solve for x
    x = 52,244,185,414.32/339,178.80
  6. Step 6: Final answer
    x = 154,031.40

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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.