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Finding the Fourth Proportional to 204.84, 307.28 and 74.96

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Solution

The fourth proportional to 204.84, 307.28 and 74.96 is: 112.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.84 : 307.28 = 74.96 : x
  2. Step 2: Convert to fraction form
    204.84/307.28 = 74.96/x
  3. Step 3: Cross multiply
    204.84x = 307.28 × 74.96
  4. Step 4: Simplify right side
    204.84x = 23,033.71
  5. Step 5: Solve for x
    x = 23,033.71/204.84
  6. Step 6: Final answer
    x = 112.45

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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.