Home / 1,361.27-2,042.21-436.90

Finding the Fourth Proportional to 1,361.27, 2,042.21 and 436.90

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Solution

The fourth proportional to 1,361.27, 2,042.21 and 436.90 is: 655.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361.27 : 2,042.21 = 436.90 : x
  2. Step 2: Convert to fraction form
    1,361.27/2,042.21 = 436.90/x
  3. Step 3: Cross multiply
    1,361.27x = 2,042.21 × 436.90
  4. Step 4: Simplify right side
    1,361.27x = 892,241.55
  5. Step 5: Solve for x
    x = 892,241.55/1,361.27
  6. Step 6: Final answer
    x = 655.45

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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.