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Finding the Fourth Proportional to 393.58, 590.49 and 249.40

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Solution

The fourth proportional to 393.58, 590.49 and 249.40 is: 374.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.58 : 590.49 = 249.40 : x
  2. Step 2: Convert to fraction form
    393.58/590.49 = 249.40/x
  3. Step 3: Cross multiply
    393.58x = 590.49 × 249.40
  4. Step 4: Simplify right side
    393.58x = 147,268.21
  5. Step 5: Solve for x
    x = 147,268.21/393.58
  6. Step 6: Final answer
    x = 374.18

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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.