Home / 1,391.23-1,919.73-801.73

Finding the Fourth Proportional to 1,391.23, 1,919.73 and 801.73

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Solution

The fourth proportional to 1,391.23, 1,919.73 and 801.73 is: 1,106.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.23 : 1,919.73 = 801.73 : x
  2. Step 2: Convert to fraction form
    1,391.23/1,919.73 = 801.73/x
  3. Step 3: Cross multiply
    1,391.23x = 1,919.73 × 801.73
  4. Step 4: Simplify right side
    1,391.23x = 1,539,105.13
  5. Step 5: Solve for x
    x = 1,539,105.13/1,391.23
  6. Step 6: Final answer
    x = 1,106.29

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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.