Home / 1,698.12-2,341.74-1,231.56

Finding the Fourth Proportional to 1,698.12, 2,341.74 and 1,231.56

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Solution

The fourth proportional to 1,698.12, 2,341.74 and 1,231.56 is: 1,698.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,698.12 : 2,341.74 = 1,231.56 : x
  2. Step 2: Convert to fraction form
    1,698.12/2,341.74 = 1,231.56/x
  3. Step 3: Cross multiply
    1,698.12x = 2,341.74 × 1,231.56
  4. Step 4: Simplify right side
    1,698.12x = 2,883,993.31
  5. Step 5: Solve for x
    x = 2,883,993.31/1,698.12
  6. Step 6: Final answer
    x = 1,698.34

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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.