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Finding the Fourth Proportional to 191.95, 287.77 and 76.35

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Solution

The fourth proportional to 191.95, 287.77 and 76.35 is: 114.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.95 : 287.77 = 76.35 : x
  2. Step 2: Convert to fraction form
    191.95/287.77 = 76.35/x
  3. Step 3: Cross multiply
    191.95x = 287.77 × 76.35
  4. Step 4: Simplify right side
    191.95x = 21,971.24
  5. Step 5: Solve for x
    x = 21,971.24/191.95
  6. Step 6: Final answer
    x = 114.46

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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.