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Finding the Fourth Proportional to 1,742.78, 2,612.63 and 908.09

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Solution

The fourth proportional to 1,742.78, 2,612.63 and 908.09 is: 1,361.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,742.78 : 2,612.63 = 908.09 : x
  2. Step 2: Convert to fraction form
    1,742.78/2,612.63 = 908.09/x
  3. Step 3: Cross multiply
    1,742.78x = 2,612.63 × 908.09
  4. Step 4: Simplify right side
    1,742.78x = 2,372,485.57
  5. Step 5: Solve for x
    x = 2,372,485.57/1,742.78
  6. Step 6: Final answer
    x = 1,361.33

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1.5x scale

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.