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Finding the Fourth Proportional to 207.68, 310.95 and 114.89

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Solution

The fourth proportional to 207.68, 310.95 and 114.89 is: 172.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.68 : 310.95 = 114.89 : x
  2. Step 2: Convert to fraction form
    207.68/310.95 = 114.89/x
  3. Step 3: Cross multiply
    207.68x = 310.95 × 114.89
  4. Step 4: Simplify right side
    207.68x = 35,723.49
  5. Step 5: Solve for x
    x = 35,723.49/207.68
  6. Step 6: Final answer
    x = 172.02

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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.