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Finding the Fourth Proportional to 1,202.96, 1,660.56 and 908.12

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Solution

The fourth proportional to 1,202.96, 1,660.56 and 908.12 is: 1,253.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,202.96 : 1,660.56 = 908.12 : x
  2. Step 2: Convert to fraction form
    1,202.96/1,660.56 = 908.12/x
  3. Step 3: Cross multiply
    1,202.96x = 1,660.56 × 908.12
  4. Step 4: Simplify right side
    1,202.96x = 1,507,987.75
  5. Step 5: Solve for x
    x = 1,507,987.75/1,202.96
  6. Step 6: Final answer
    x = 1,253.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.