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Finding the Fourth Proportional to 356.08, 534.13 and 136.81

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Solution

The fourth proportional to 356.08, 534.13 and 136.81 is: 205.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.08 : 534.13 = 136.81 : x
  2. Step 2: Convert to fraction form
    356.08/534.13 = 136.81/x
  3. Step 3: Cross multiply
    356.08x = 534.13 × 136.81
  4. Step 4: Simplify right side
    356.08x = 73,072.65
  5. Step 5: Solve for x
    x = 73,072.65/356.08
  6. Step 6: Final answer
    x = 205.21

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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.