Home / 1,247.25-1,721.78-888.57

Finding the Fourth Proportional to 1,247.25, 1,721.78 and 888.57

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Solution

The fourth proportional to 1,247.25, 1,721.78 and 888.57 is: 1,226.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.25 : 1,721.78 = 888.57 : x
  2. Step 2: Convert to fraction form
    1,247.25/1,721.78 = 888.57/x
  3. Step 3: Cross multiply
    1,247.25x = 1,721.78 × 888.57
  4. Step 4: Simplify right side
    1,247.25x = 1,529,923.44
  5. Step 5: Solve for x
    x = 1,529,923.44/1,247.25
  6. Step 6: Final answer
    x = 1,226.64

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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.