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Finding the Fourth Proportional to 349.65, 523.67 and 253.53

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Solution

The fourth proportional to 349.65, 523.67 and 253.53 is: 379.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.65 : 523.67 = 253.53 : x
  2. Step 2: Convert to fraction form
    349.65/523.67 = 253.53/x
  3. Step 3: Cross multiply
    349.65x = 523.67 × 253.53
  4. Step 4: Simplify right side
    349.65x = 132,764.79
  5. Step 5: Solve for x
    x = 132,764.79/349.65
  6. Step 6: Final answer
    x = 379.71

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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.