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Finding the Fourth Proportional to 339,689.80, 509,405.10 and 102,953.80

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Solution

The fourth proportional to 339,689.80, 509,405.10 and 102,953.80 is: 154,391.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,689.80 : 509,405.10 = 102,953.80 : x
  2. Step 2: Convert to fraction form
    339,689.80/509,405.10 = 102,953.80/x
  3. Step 3: Cross multiply
    339,689.80x = 509,405.10 × 102,953.80
  4. Step 4: Simplify right side
    339,689.80x = 52,445,190,784.38
  5. Step 5: Solve for x
    x = 52,445,190,784.38/339,689.80
  6. Step 6: Final answer
    x = 154,391.42

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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.