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Finding the Fourth Proportional to 397.80, 596.69 and 154.15

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Solution

The fourth proportional to 397.80, 596.69 and 154.15 is: 231.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.80 : 596.69 = 154.15 : x
  2. Step 2: Convert to fraction form
    397.80/596.69 = 154.15/x
  3. Step 3: Cross multiply
    397.80x = 596.69 × 154.15
  4. Step 4: Simplify right side
    397.80x = 91,979.76
  5. Step 5: Solve for x
    x = 91,979.76/397.80
  6. Step 6: Final answer
    x = 231.22

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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.