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Finding the Fourth Proportional to 309,319.86, 426,896.82 and 173,390.52

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Solution

The fourth proportional to 309,319.86, 426,896.82 and 173,390.52 is: 239,298.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,319.86 : 426,896.82 = 173,390.52 : x
  2. Step 2: Convert to fraction form
    309,319.86/426,896.82 = 173,390.52/x
  3. Step 3: Cross multiply
    309,319.86x = 426,896.82 × 173,390.52
  4. Step 4: Simplify right side
    309,319.86x = 74,019,861,606.15
  5. Step 5: Solve for x
    x = 74,019,861,606.15/309,319.86
  6. Step 6: Final answer
    x = 239,298.77

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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.