Home / 1,223.20-1,687.23-797.95

Finding the Fourth Proportional to 1,223.20, 1,687.23 and 797.95

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Solution

The fourth proportional to 1,223.20, 1,687.23 and 797.95 is: 1,100.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223.20 : 1,687.23 = 797.95 : x
  2. Step 2: Convert to fraction form
    1,223.20/1,687.23 = 797.95/x
  3. Step 3: Cross multiply
    1,223.20x = 1,687.23 × 797.95
  4. Step 4: Simplify right side
    1,223.20x = 1,346,327.29
  5. Step 5: Solve for x
    x = 1,346,327.29/1,223.20
  6. Step 6: Final answer
    x = 1,100.66

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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.