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Finding the Fourth Proportional to 309,337.86, 426,921.66 and 173,408.52

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Solution

The fourth proportional to 309,337.86, 426,921.66 and 173,408.52 is: 239,323.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,337.86 : 426,921.66 = 173,408.52 : x
  2. Step 2: Convert to fraction form
    309,337.86/426,921.66 = 173,408.52/x
  3. Step 3: Cross multiply
    309,337.86x = 426,921.66 × 173,408.52
  4. Step 4: Simplify right side
    309,337.86x = 74,031,853,216.54
  5. Step 5: Solve for x
    x = 74,031,853,216.54/309,337.86
  6. Step 6: Final answer
    x = 239,323.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.