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Finding the Fourth Proportional to 801.87, 1,202.60 and 253.91

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Solution

The fourth proportional to 801.87, 1,202.60 and 253.91 is: 380.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.87 : 1,202.60 = 253.91 : x
  2. Step 2: Convert to fraction form
    801.87/1,202.60 = 253.91/x
  3. Step 3: Cross multiply
    801.87x = 1,202.60 × 253.91
  4. Step 4: Simplify right side
    801.87x = 305,346.79
  5. Step 5: Solve for x
    x = 305,346.79/801.87
  6. Step 6: Final answer
    x = 380.79

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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.