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Finding the Fourth Proportional to 339,427.80, 509,012.10 and 102,691.80

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Solution

The fourth proportional to 339,427.80, 509,012.10 and 102,691.80 is: 153,998.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,427.80 : 509,012.10 = 102,691.80 : x
  2. Step 2: Convert to fraction form
    339,427.80/509,012.10 = 102,691.80/x
  3. Step 3: Cross multiply
    339,427.80x = 509,012.10 × 102,691.80
  4. Step 4: Simplify right side
    339,427.80x = 52,271,368,770.78
  5. Step 5: Solve for x
    x = 52,271,368,770.78/339,427.80
  6. Step 6: Final answer
    x = 153,998.49

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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.