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Finding the Fourth Proportional to 191.07, 261.90 and 188.28

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Solution

The fourth proportional to 191.07, 261.90 and 188.28 is: 258.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.07 : 261.90 = 188.28 : x
  2. Step 2: Convert to fraction form
    191.07/261.90 = 188.28/x
  3. Step 3: Cross multiply
    191.07x = 261.90 × 188.28
  4. Step 4: Simplify right side
    191.07x = 49,310.53
  5. Step 5: Solve for x
    x = 49,310.53/191.07
  6. Step 6: Final answer
    x = 258.08

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.