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Finding the Fourth Proportional to 339,672.40, 509,492.40 and 115,010.80

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Solution

The fourth proportional to 339,672.40, 509,492.40 and 115,010.80 is: 172,510.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,672.40 : 509,492.40 = 115,010.80 : x
  2. Step 2: Convert to fraction form
    339,672.40/509,492.40 = 115,010.80/x
  3. Step 3: Cross multiply
    339,672.40x = 509,492.40 × 115,010.80
  4. Step 4: Simplify right side
    339,672.40x = 58,597,128,517.92
  5. Step 5: Solve for x
    x = 58,597,128,517.92/339,672.40
  6. Step 6: Final answer
    x = 172,510.71

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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.