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Finding the Fourth Proportional to 512.79, 767.98 and 329.64

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Solution

The fourth proportional to 512.79, 767.98 and 329.64 is: 493.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.79 : 767.98 = 329.64 : x
  2. Step 2: Convert to fraction form
    512.79/767.98 = 329.64/x
  3. Step 3: Cross multiply
    512.79x = 767.98 × 329.64
  4. Step 4: Simplify right side
    512.79x = 253,156.93
  5. Step 5: Solve for x
    x = 253,156.93/512.79
  6. Step 6: Final answer
    x = 493.69

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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.