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Finding the Fourth Proportional to 205.71, 307.81 and 177.15

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Solution

The fourth proportional to 205.71, 307.81 and 177.15 is: 265.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.71 : 307.81 = 177.15 : x
  2. Step 2: Convert to fraction form
    205.71/307.81 = 177.15/x
  3. Step 3: Cross multiply
    205.71x = 307.81 × 177.15
  4. Step 4: Simplify right side
    205.71x = 54,529.92
  5. Step 5: Solve for x
    x = 54,529.92/205.71
  6. Step 6: Final answer
    x = 265.09

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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.