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Finding the Fourth Proportional to 270.62, 405.47 and 154.78

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Solution

The fourth proportional to 270.62, 405.47 and 154.78 is: 231.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.62 : 405.47 = 154.78 : x
  2. Step 2: Convert to fraction form
    270.62/405.47 = 154.78/x
  3. Step 3: Cross multiply
    270.62x = 405.47 × 154.78
  4. Step 4: Simplify right side
    270.62x = 62,758.02
  5. Step 5: Solve for x
    x = 62,758.02/270.62
  6. Step 6: Final answer
    x = 231.90

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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.