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Finding the Fourth Proportional to 191.44, 287.10 and 69.68

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Solution

The fourth proportional to 191.44, 287.10 and 69.68 is: 104.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.44 : 287.10 = 69.68 : x
  2. Step 2: Convert to fraction form
    191.44/287.10 = 69.68/x
  3. Step 3: Cross multiply
    191.44x = 287.10 × 69.68
  4. Step 4: Simplify right side
    191.44x = 20,005.13
  5. Step 5: Solve for x
    x = 20,005.13/191.44
  6. Step 6: Final answer
    x = 104.50

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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.