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Finding the Fourth Proportional to 253.73, 380.60 and 71.16

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Solution

The fourth proportional to 253.73, 380.60 and 71.16 is: 106.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.73 : 380.60 = 71.16 : x
  2. Step 2: Convert to fraction form
    253.73/380.60 = 71.16/x
  3. Step 3: Cross multiply
    253.73x = 380.60 × 71.16
  4. Step 4: Simplify right side
    253.73x = 27,083.14
  5. Step 5: Solve for x
    x = 27,083.14/253.73
  6. Step 6: Final answer
    x = 106.74

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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.