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Finding the Fourth Proportional to 393.64, 590.46 and 223.72

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Solution

The fourth proportional to 393.64, 590.46 and 223.72 is: 335.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.64 : 590.46 = 223.72 : x
  2. Step 2: Convert to fraction form
    393.64/590.46 = 223.72/x
  3. Step 3: Cross multiply
    393.64x = 590.46 × 223.72
  4. Step 4: Simplify right side
    393.64x = 132,097.71
  5. Step 5: Solve for x
    x = 132,097.71/393.64
  6. Step 6: Final answer
    x = 335.58

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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.