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Finding the Fourth Proportional to 239.22, 357.36 and 191.18

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Solution

The fourth proportional to 239.22, 357.36 and 191.18 is: 285.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.22 : 357.36 = 191.18 : x
  2. Step 2: Convert to fraction form
    239.22/357.36 = 191.18/x
  3. Step 3: Cross multiply
    239.22x = 357.36 × 191.18
  4. Step 4: Simplify right side
    239.22x = 68,320.08
  5. Step 5: Solve for x
    x = 68,320.08/239.22
  6. Step 6: Final answer
    x = 285.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.