Home / 1,641.36-2,265.66-1,247.70

Finding the Fourth Proportional to 1,641.36, 2,265.66 and 1,247.70

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Solution

The fourth proportional to 1,641.36, 2,265.66 and 1,247.70 is: 1,722.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,641.36 : 2,265.66 = 1,247.70 : x
  2. Step 2: Convert to fraction form
    1,641.36/2,265.66 = 1,247.70/x
  3. Step 3: Cross multiply
    1,641.36x = 2,265.66 × 1,247.70
  4. Step 4: Simplify right side
    1,641.36x = 2,826,863.98
  5. Step 5: Solve for x
    x = 2,826,863.98/1,641.36
  6. Step 6: Final answer
    x = 1,722.27

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1.5x scale

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.