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Finding the Fourth Proportional to 253,187.78, 379,431.39 and 215,551.94

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Solution

The fourth proportional to 253,187.78, 379,431.39 and 215,551.94 is: 323,029.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,187.78 : 379,431.39 = 215,551.94 : x
  2. Step 2: Convert to fraction form
    253,187.78/379,431.39 = 215,551.94/x
  3. Step 3: Cross multiply
    253,187.78x = 379,431.39 × 215,551.94
  4. Step 4: Simplify right side
    253,187.78x = 81,787,172,211.40
  5. Step 5: Solve for x
    x = 81,787,172,211.40/253,187.78
  6. Step 6: Final answer
    x = 323,029.70

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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.