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Finding the Fourth Proportional to 192.68, 265.66 and 155.72

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Solution

The fourth proportional to 192.68, 265.66 and 155.72 is: 214.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.68 : 265.66 = 155.72 : x
  2. Step 2: Convert to fraction form
    192.68/265.66 = 155.72/x
  3. Step 3: Cross multiply
    192.68x = 265.66 × 155.72
  4. Step 4: Simplify right side
    192.68x = 41,367.25
  5. Step 5: Solve for x
    x = 41,367.25/192.68
  6. Step 6: Final answer
    x = 214.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.