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Finding the Fourth Proportional to 308.91, 462.30 and 187.26

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Solution

The fourth proportional to 308.91, 462.30 and 187.26 is: 280.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.91 : 462.30 = 187.26 : x
  2. Step 2: Convert to fraction form
    308.91/462.30 = 187.26/x
  3. Step 3: Cross multiply
    308.91x = 462.30 × 187.26
  4. Step 4: Simplify right side
    308.91x = 86,570.30
  5. Step 5: Solve for x
    x = 86,570.30/308.91
  6. Step 6: Final answer
    x = 280.24

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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.