Home / 2,383.74-3,289.57-1,389.70

Finding the Fourth Proportional to 2,383.74, 3,289.57 and 1,389.70

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Solution

The fourth proportional to 2,383.74, 3,289.57 and 1,389.70 is: 1,917.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,383.74 : 3,289.57 = 1,389.70 : x
  2. Step 2: Convert to fraction form
    2,383.74/3,289.57 = 1,389.70/x
  3. Step 3: Cross multiply
    2,383.74x = 3,289.57 × 1,389.70
  4. Step 4: Simplify right side
    2,383.74x = 4,571,515.43
  5. Step 5: Solve for x
    x = 4,571,515.43/2,383.74
  6. Step 6: Final answer
    x = 1,917.79

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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.