Home / 2,219.79-3,062.82-1,287.75

Finding the Fourth Proportional to 2,219.79, 3,062.82 and 1,287.75

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Solution

The fourth proportional to 2,219.79, 3,062.82 and 1,287.75 is: 1,776.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.79 : 3,062.82 = 1,287.75 : x
  2. Step 2: Convert to fraction form
    2,219.79/3,062.82 = 1,287.75/x
  3. Step 3: Cross multiply
    2,219.79x = 3,062.82 × 1,287.75
  4. Step 4: Simplify right side
    2,219.79x = 3,944,146.46
  5. Step 5: Solve for x
    x = 3,944,146.46/2,219.79
  6. Step 6: Final answer
    x = 1,776.81

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.