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Finding the Fourth Proportional to 512.10, 768.15 and 146.87

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Solution

The fourth proportional to 512.10, 768.15 and 146.87 is: 220.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.10 : 768.15 = 146.87 : x
  2. Step 2: Convert to fraction form
    512.10/768.15 = 146.87/x
  3. Step 3: Cross multiply
    512.10x = 768.15 × 146.87
  4. Step 4: Simplify right side
    512.10x = 112,814.35
  5. Step 5: Solve for x
    x = 112,814.35/512.10
  6. Step 6: Final answer
    x = 220.30

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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.