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Finding the Fourth Proportional to 205.62, 307.90 and 136.00

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Solution

The fourth proportional to 205.62, 307.90 and 136.00 is: 203.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.62 : 307.90 = 136.00 : x
  2. Step 2: Convert to fraction form
    205.62/307.90 = 136.00/x
  3. Step 3: Cross multiply
    205.62x = 307.90 × 136.00
  4. Step 4: Simplify right side
    205.62x = 41,873.65
  5. Step 5: Solve for x
    x = 41,873.65/205.62
  6. Step 6: Final answer
    x = 203.65

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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.