Home / 1,447.32-1,991.14-1,278.44

Finding the Fourth Proportional to 1,447.32, 1,991.14 and 1,278.44

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Solution

The fourth proportional to 1,447.32, 1,991.14 and 1,278.44 is: 1,758.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.32 : 1,991.14 = 1,278.44 : x
  2. Step 2: Convert to fraction form
    1,447.32/1,991.14 = 1,278.44/x
  3. Step 3: Cross multiply
    1,447.32x = 1,991.14 × 1,278.44
  4. Step 4: Simplify right side
    1,447.32x = 2,545,553.02
  5. Step 5: Solve for x
    x = 2,545,553.02/1,447.32
  6. Step 6: Final answer
    x = 1,758.80

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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.