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Finding the Fourth Proportional to 800.97, 1,201.28 and 253.19

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Solution

The fourth proportional to 800.97, 1,201.28 and 253.19 is: 379.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.97 : 1,201.28 = 253.19 : x
  2. Step 2: Convert to fraction form
    800.97/1,201.28 = 253.19/x
  3. Step 3: Cross multiply
    800.97x = 1,201.28 × 253.19
  4. Step 4: Simplify right side
    800.97x = 304,150.82
  5. Step 5: Solve for x
    x = 304,150.82/800.97
  6. Step 6: Final answer
    x = 379.73

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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.