Home / 1,951.85-2,689.65-1,391.33

Finding the Fourth Proportional to 1,951.85, 2,689.65 and 1,391.33

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Solution

The fourth proportional to 1,951.85, 2,689.65 and 1,391.33 is: 1,917.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,951.85 : 2,689.65 = 1,391.33 : x
  2. Step 2: Convert to fraction form
    1,951.85/2,689.65 = 1,391.33/x
  3. Step 3: Cross multiply
    1,951.85x = 2,689.65 × 1,391.33
  4. Step 4: Simplify right side
    1,951.85x = 3,742,177.29
  5. Step 5: Solve for x
    x = 3,742,177.29/1,951.85
  6. Step 6: Final answer
    x = 1,917.25

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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.