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Finding the Fourth Proportional to 308.81, 461.51 and 247.66

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Solution

The fourth proportional to 308.81, 461.51 and 247.66 is: 370.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.81 : 461.51 = 247.66 : x
  2. Step 2: Convert to fraction form
    308.81/461.51 = 247.66/x
  3. Step 3: Cross multiply
    308.81x = 461.51 × 247.66
  4. Step 4: Simplify right side
    308.81x = 114,297.50
  5. Step 5: Solve for x
    x = 114,297.50/308.81
  6. Step 6: Final answer
    x = 370.12

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.