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Finding the Fourth Proportional to 393.91, 591.47 and 262.34

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Solution

The fourth proportional to 393.91, 591.47 and 262.34 is: 393.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.91 : 591.47 = 262.34 : x
  2. Step 2: Convert to fraction form
    393.91/591.47 = 262.34/x
  3. Step 3: Cross multiply
    393.91x = 591.47 × 262.34
  4. Step 4: Simplify right side
    393.91x = 155,163.45
  5. Step 5: Solve for x
    x = 155,163.45/393.91
  6. Step 6: Final answer
    x = 393.91

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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.