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Finding the Fourth Proportional to 191.61, 266.26 and 189.63

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Solution

The fourth proportional to 191.61, 266.26 and 189.63 is: 263.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.61 : 266.26 = 189.63 : x
  2. Step 2: Convert to fraction form
    191.61/266.26 = 189.63/x
  3. Step 3: Cross multiply
    191.61x = 266.26 × 189.63
  4. Step 4: Simplify right side
    191.61x = 50,490.88
  5. Step 5: Solve for x
    x = 50,490.88/191.61
  6. Step 6: Final answer
    x = 263.51

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.