Home / 1,119.09-1,687.59-1,103.71

Finding the Fourth Proportional to 1,119.09, 1,687.59 and 1,103.71

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Solution

The fourth proportional to 1,119.09, 1,687.59 and 1,103.71 is: 1,664.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.09 : 1,687.59 = 1,103.71 : x
  2. Step 2: Convert to fraction form
    1,119.09/1,687.59 = 1,103.71/x
  3. Step 3: Cross multiply
    1,119.09x = 1,687.59 × 1,103.71
  4. Step 4: Simplify right side
    1,119.09x = 1,862,609.96
  5. Step 5: Solve for x
    x = 1,862,609.96/1,119.09
  6. Step 6: Final answer
    x = 1,664.40

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.