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Finding the Fourth Proportional to 393.14, 589.95 and 247.08

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Solution

The fourth proportional to 393.14, 589.95 and 247.08 is: 370.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.14 : 589.95 = 247.08 : x
  2. Step 2: Convert to fraction form
    393.14/589.95 = 247.08/x
  3. Step 3: Cross multiply
    393.14x = 589.95 × 247.08
  4. Step 4: Simplify right side
    393.14x = 145,764.85
  5. Step 5: Solve for x
    x = 145,764.85/393.14
  6. Step 6: Final answer
    x = 370.78

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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.