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Finding the Fourth Proportional to 191.61, 264.42 and 104.28

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Solution

The fourth proportional to 191.61, 264.42 and 104.28 is: 143.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.61 : 264.42 = 104.28 : x
  2. Step 2: Convert to fraction form
    191.61/264.42 = 104.28/x
  3. Step 3: Cross multiply
    191.61x = 264.42 × 104.28
  4. Step 4: Simplify right side
    191.61x = 27,573.72
  5. Step 5: Solve for x
    x = 27,573.72/191.61
  6. Step 6: Final answer
    x = 143.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.