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Finding the Fourth Proportional to 901.12, 1,351.68 and 251.86

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Solution

The fourth proportional to 901.12, 1,351.68 and 251.86 is: 377.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.12 : 1,351.68 = 251.86 : x
  2. Step 2: Convert to fraction form
    901.12/1,351.68 = 251.86/x
  3. Step 3: Cross multiply
    901.12x = 1,351.68 × 251.86
  4. Step 4: Simplify right side
    901.12x = 340,434.12
  5. Step 5: Solve for x
    x = 340,434.12/901.12
  6. Step 6: Final answer
    x = 377.79

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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.