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Finding the Fourth Proportional to 900.89, 1,351.28 and 251.60

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Solution

The fourth proportional to 900.89, 1,351.28 and 251.60 is: 377.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.89 : 1,351.28 = 251.60 : x
  2. Step 2: Convert to fraction form
    900.89/1,351.28 = 251.60/x
  3. Step 3: Cross multiply
    900.89x = 1,351.28 × 251.60
  4. Step 4: Simplify right side
    900.89x = 339,974.03
  5. Step 5: Solve for x
    x = 339,974.03/900.89
  6. Step 6: Final answer
    x = 377.38

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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.