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Finding the Fourth Proportional to 356.05, 534.08 and 136.64

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Solution

The fourth proportional to 356.05, 534.08 and 136.64 is: 204.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.05 : 534.08 = 136.64 : x
  2. Step 2: Convert to fraction form
    356.05/534.08 = 136.64/x
  3. Step 3: Cross multiply
    356.05x = 534.08 × 136.64
  4. Step 4: Simplify right side
    356.05x = 72,976.69
  5. Step 5: Solve for x
    x = 72,976.69/356.05
  6. Step 6: Final answer
    x = 204.96

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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.