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Finding the Fourth Proportional to 1,270.53, 1,906.25 and 908.15

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Solution

The fourth proportional to 1,270.53, 1,906.25 and 908.15 is: 1,362.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.53 : 1,906.25 = 908.15 : x
  2. Step 2: Convert to fraction form
    1,270.53/1,906.25 = 908.15/x
  3. Step 3: Cross multiply
    1,270.53x = 1,906.25 × 908.15
  4. Step 4: Simplify right side
    1,270.53x = 1,731,146.87
  5. Step 5: Solve for x
    x = 1,731,146.87/1,270.53
  6. Step 6: Final answer
    x = 1,362.54

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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.