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Finding the Fourth Proportional to 168.40, 247.17 and 168.40

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Solution

The fourth proportional to 168.40, 247.17 and 168.40 is: 247.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.40 : 247.17 = 168.40 : x
  2. Step 2: Convert to fraction form
    168.40/247.17 = 168.40/x
  3. Step 3: Cross multiply
    168.40x = 247.17 × 168.40
  4. Step 4: Simplify right side
    168.40x = 41,623.43
  5. Step 5: Solve for x
    x = 41,623.43/168.40
  6. Step 6: Final answer
    x = 247.17

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.