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Finding the Fourth Proportional to 309, 462.76 and 227.64

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Solution

The fourth proportional to 309, 462.76 and 227.64 is: 340.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    309 : 462.76 = 227.64 : x
  2. Step 2: Convert to fraction form
    309/462.76 = 227.64/x
  3. Step 3: Cross multiply
    309x = 462.76 × 227.64
  4. Step 4: Simplify right side
    309x = 105,342.69
  5. Step 5: Solve for x
    x = 105,342.69/309
  6. Step 6: Final answer
    x = 340.91

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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.