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Finding the Fourth Proportional to 393.30, 589.68 and 271.26

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Solution

The fourth proportional to 393.30, 589.68 and 271.26 is: 406.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.30 : 589.68 = 271.26 : x
  2. Step 2: Convert to fraction form
    393.30/589.68 = 271.26/x
  3. Step 3: Cross multiply
    393.30x = 589.68 × 271.26
  4. Step 4: Simplify right side
    393.30x = 159,956.60
  5. Step 5: Solve for x
    x = 159,956.60/393.30
  6. Step 6: Final answer
    x = 406.70

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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.