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Finding the Fourth Proportional to 253.17, 379.71 and 106.88

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Solution

The fourth proportional to 253.17, 379.71 and 106.88 is: 160.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.17 : 379.71 = 106.88 : x
  2. Step 2: Convert to fraction form
    253.17/379.71 = 106.88/x
  3. Step 3: Cross multiply
    253.17x = 379.71 × 106.88
  4. Step 4: Simplify right side
    253.17x = 40,581.51
  5. Step 5: Solve for x
    x = 40,581.51/253.17
  6. Step 6: Final answer
    x = 160.29

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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.