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Finding the Fourth Proportional to 253.88, 381 and 162.68

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Solution

The fourth proportional to 253.88, 381 and 162.68 is: 244.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.88 : 381 = 162.68 : x
  2. Step 2: Convert to fraction form
    253.88/381 = 162.68/x
  3. Step 3: Cross multiply
    253.88x = 381 × 162.68
  4. Step 4: Simplify right side
    253.88x = 61,981.08
  5. Step 5: Solve for x
    x = 61,981.08/253.88
  6. Step 6: Final answer
    x = 244.14

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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.