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Finding the Fourth Proportional to 253.65, 378.65 and 234.17

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Solution

The fourth proportional to 253.65, 378.65 and 234.17 is: 349.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.65 : 378.65 = 234.17 : x
  2. Step 2: Convert to fraction form
    253.65/378.65 = 234.17/x
  3. Step 3: Cross multiply
    253.65x = 378.65 × 234.17
  4. Step 4: Simplify right side
    253.65x = 88,668.47
  5. Step 5: Solve for x
    x = 88,668.47/253.65
  6. Step 6: Final answer
    x = 349.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.