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Finding the Fourth Proportional to 309.27, 426.76 and 176.47

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Solution

The fourth proportional to 309.27, 426.76 and 176.47 is: 243.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.27 : 426.76 = 176.47 : x
  2. Step 2: Convert to fraction form
    309.27/426.76 = 176.47/x
  3. Step 3: Cross multiply
    309.27x = 426.76 × 176.47
  4. Step 4: Simplify right side
    309.27x = 75,308.83
  5. Step 5: Solve for x
    x = 75,308.83/309.27
  6. Step 6: Final answer
    x = 243.50

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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.