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Finding the Fourth Proportional to 517.95, 776.91 and 127.95

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Solution

The fourth proportional to 517.95, 776.91 and 127.95 is: 191.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.95 : 776.91 = 127.95 : x
  2. Step 2: Convert to fraction form
    517.95/776.91 = 127.95/x
  3. Step 3: Cross multiply
    517.95x = 776.91 × 127.95
  4. Step 4: Simplify right side
    517.95x = 99,405.63
  5. Step 5: Solve for x
    x = 99,405.63/517.95
  6. Step 6: Final answer
    x = 191.92

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.