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Finding the Fourth Proportional to 247.91, 373.73 and 218.34

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Solution

The fourth proportional to 247.91, 373.73 and 218.34 is: 329.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.91 : 373.73 = 218.34 : x
  2. Step 2: Convert to fraction form
    247.91/373.73 = 218.34/x
  3. Step 3: Cross multiply
    247.91x = 373.73 × 218.34
  4. Step 4: Simplify right side
    247.91x = 81,599.12
  5. Step 5: Solve for x
    x = 81,599.12/247.91
  6. Step 6: Final answer
    x = 329.15

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.