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Finding the Fourth Proportional to 1,361.08, 2,039.62 and 609.68

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Solution

The fourth proportional to 1,361.08, 2,039.62 and 609.68 is: 913.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361.08 : 2,039.62 = 609.68 : x
  2. Step 2: Convert to fraction form
    1,361.08/2,039.62 = 609.68/x
  3. Step 3: Cross multiply
    1,361.08x = 2,039.62 × 609.68
  4. Step 4: Simplify right side
    1,361.08x = 1,243,515.52
  5. Step 5: Solve for x
    x = 1,243,515.52/1,361.08
  6. Step 6: Final answer
    x = 913.62

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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.