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Finding the Fourth Proportional to 191.18, 286.80 and 88.50

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Solution

The fourth proportional to 191.18, 286.80 and 88.50 is: 132.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.18 : 286.80 = 88.50 : x
  2. Step 2: Convert to fraction form
    191.18/286.80 = 88.50/x
  3. Step 3: Cross multiply
    191.18x = 286.80 × 88.50
  4. Step 4: Simplify right side
    191.18x = 25,381.80
  5. Step 5: Solve for x
    x = 25,381.80/191.18
  6. Step 6: Final answer
    x = 132.76

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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.