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Finding the Fourth Proportional to 208,249.56, 312,374.34 and 50,478

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Solution

The fourth proportional to 208,249.56, 312,374.34 and 50,478 is: 75,717

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,249.56 : 312,374.34 = 50,478 : x
  2. Step 2: Convert to fraction form
    208,249.56/312,374.34 = 50,478/x
  3. Step 3: Cross multiply
    208,249.56x = 312,374.34 × 50,478
  4. Step 4: Simplify right side
    208,249.56x = 15,768,031,934.52
  5. Step 5: Solve for x
    x = 15,768,031,934.52/208,249.56
  6. Step 6: Final answer
    x = 75,717

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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.