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Finding the Fourth Proportional to 617.21, 925.82 and 206.35

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Solution

The fourth proportional to 617.21, 925.82 and 206.35 is: 309.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.21 : 925.82 = 206.35 : x
  2. Step 2: Convert to fraction form
    617.21/925.82 = 206.35/x
  3. Step 3: Cross multiply
    617.21x = 925.82 × 206.35
  4. Step 4: Simplify right side
    617.21x = 191,037.30
  5. Step 5: Solve for x
    x = 191,037.30/617.21
  6. Step 6: Final answer
    x = 309.52

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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.