Home / 1,229.39-1,698.72-982.75

Finding the Fourth Proportional to 1,229.39, 1,698.72 and 982.75

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Solution

The fourth proportional to 1,229.39, 1,698.72 and 982.75 is: 1,357.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,229.39 : 1,698.72 = 982.75 : x
  2. Step 2: Convert to fraction form
    1,229.39/1,698.72 = 982.75/x
  3. Step 3: Cross multiply
    1,229.39x = 1,698.72 × 982.75
  4. Step 4: Simplify right side
    1,229.39x = 1,669,403.67
  5. Step 5: Solve for x
    x = 1,669,403.67/1,229.39
  6. Step 6: Final answer
    x = 1,357.91

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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.