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Finding the Fourth Proportional to 1,361.77, 2,042.89 and 437.22

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Solution

The fourth proportional to 1,361.77, 2,042.89 and 437.22 is: 655.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361.77 : 2,042.89 = 437.22 : x
  2. Step 2: Convert to fraction form
    1,361.77/2,042.89 = 437.22/x
  3. Step 3: Cross multiply
    1,361.77x = 2,042.89 × 437.22
  4. Step 4: Simplify right side
    1,361.77x = 893,191.27
  5. Step 5: Solve for x
    x = 893,191.27/1,361.77
  6. Step 6: Final answer
    x = 655.91

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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.