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Finding the Fourth Proportional to 204.91, 307.35 and 76.57

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Solution

The fourth proportional to 204.91, 307.35 and 76.57 is: 114.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.91 : 307.35 = 76.57 : x
  2. Step 2: Convert to fraction form
    204.91/307.35 = 76.57/x
  3. Step 3: Cross multiply
    204.91x = 307.35 × 76.57
  4. Step 4: Simplify right side
    204.91x = 23,533.79
  5. Step 5: Solve for x
    x = 23,533.79/204.91
  6. Step 6: Final answer
    x = 114.85

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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.