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Finding the Fourth Proportional to 204.90, 307.38 and 102.17

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Solution

The fourth proportional to 204.90, 307.38 and 102.17 is: 153.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.90 : 307.38 = 102.17 : x
  2. Step 2: Convert to fraction form
    204.90/307.38 = 102.17/x
  3. Step 3: Cross multiply
    204.90x = 307.38 × 102.17
  4. Step 4: Simplify right side
    204.90x = 31,403.48
  5. Step 5: Solve for x
    x = 31,403.48/204.90
  6. Step 6: Final answer
    x = 153.26

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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.