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Finding the Fourth Proportional to 205.28, 307.57 and 144.13

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Solution

The fourth proportional to 205.28, 307.57 and 144.13 is: 215.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.28 : 307.57 = 144.13 : x
  2. Step 2: Convert to fraction form
    205.28/307.57 = 144.13/x
  3. Step 3: Cross multiply
    205.28x = 307.57 × 144.13
  4. Step 4: Simplify right side
    205.28x = 44,330.19
  5. Step 5: Solve for x
    x = 44,330.19/205.28
  6. Step 6: Final answer
    x = 215.95

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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.