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Finding the Fourth Proportional to 308,854.80, 426,188.52 and 172,879.92

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Solution

The fourth proportional to 308,854.80, 426,188.52 and 172,879.92 is: 238,556.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,854.80 : 426,188.52 = 172,879.92 : x
  2. Step 2: Convert to fraction form
    308,854.80/426,188.52 = 172,879.92/x
  3. Step 3: Cross multiply
    308,854.80x = 426,188.52 × 172,879.92
  4. Step 4: Simplify right side
    308,854.80x = 73,679,437,242.52
  5. Step 5: Solve for x
    x = 73,679,437,242.52/308,854.80
  6. Step 6: Final answer
    x = 238,556.88

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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.