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Finding the Fourth Proportional to 512.20, 706.55 and 365.05

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Solution

The fourth proportional to 512.20, 706.55 and 365.05 is: 503.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.20 : 706.55 = 365.05 : x
  2. Step 2: Convert to fraction form
    512.20/706.55 = 365.05/x
  3. Step 3: Cross multiply
    512.20x = 706.55 × 365.05
  4. Step 4: Simplify right side
    512.20x = 257,922.49
  5. Step 5: Solve for x
    x = 257,922.49/512.20
  6. Step 6: Final answer
    x = 503.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.