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Finding the Fourth Proportional to 512.91, 769.34 and 166.17

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Solution

The fourth proportional to 512.91, 769.34 and 166.17 is: 249.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.91 : 769.34 = 166.17 : x
  2. Step 2: Convert to fraction form
    512.91/769.34 = 166.17/x
  3. Step 3: Cross multiply
    512.91x = 769.34 × 166.17
  4. Step 4: Simplify right side
    512.91x = 127,840.40
  5. Step 5: Solve for x
    x = 127,840.40/512.91
  6. Step 6: Final answer
    x = 249.25

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1.5x scale

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.