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Finding the Fourth Proportional to 393.65, 590.02 and 348.09

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Solution

The fourth proportional to 393.65, 590.02 and 348.09 is: 521.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.65 : 590.02 = 348.09 : x
  2. Step 2: Convert to fraction form
    393.65/590.02 = 348.09/x
  3. Step 3: Cross multiply
    393.65x = 590.02 × 348.09
  4. Step 4: Simplify right side
    393.65x = 205,380.50
  5. Step 5: Solve for x
    x = 205,380.50/393.65
  6. Step 6: Final answer
    x = 521.73

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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.