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Finding the Fourth Proportional to 511.77, 767.70 and 165.11

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Solution

The fourth proportional to 511.77, 767.70 and 165.11 is: 247.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.77 : 767.70 = 165.11 : x
  2. Step 2: Convert to fraction form
    511.77/767.70 = 165.11/x
  3. Step 3: Cross multiply
    511.77x = 767.70 × 165.11
  4. Step 4: Simplify right side
    511.77x = 126,754.12
  5. Step 5: Solve for x
    x = 126,754.12/511.77
  6. Step 6: Final answer
    x = 247.68

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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.