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Finding the Fourth Proportional to 262.15, 393.06 and 231.77

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Solution

The fourth proportional to 262.15, 393.06 and 231.77 is: 347.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.15 : 393.06 = 231.77 : x
  2. Step 2: Convert to fraction form
    262.15/393.06 = 231.77/x
  3. Step 3: Cross multiply
    262.15x = 393.06 × 231.77
  4. Step 4: Simplify right side
    262.15x = 91,099.52
  5. Step 5: Solve for x
    x = 91,099.52/262.15
  6. Step 6: Final answer
    x = 347.51

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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.