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Finding the Fourth Proportional to 191.52, 288.44 and 161.28

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Solution

The fourth proportional to 191.52, 288.44 and 161.28 is: 242.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.52 : 288.44 = 161.28 : x
  2. Step 2: Convert to fraction form
    191.52/288.44 = 161.28/x
  3. Step 3: Cross multiply
    191.52x = 288.44 × 161.28
  4. Step 4: Simplify right side
    191.52x = 46,518.80
  5. Step 5: Solve for x
    x = 46,518.80/191.52
  6. Step 6: Final answer
    x = 242.89

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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.