Home / 1,231.26-1,698.17-858.83

Finding the Fourth Proportional to 1,231.26, 1,698.17 and 858.83

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Solution

The fourth proportional to 1,231.26, 1,698.17 and 858.83 is: 1,184.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.26 : 1,698.17 = 858.83 : x
  2. Step 2: Convert to fraction form
    1,231.26/1,698.17 = 858.83/x
  3. Step 3: Cross multiply
    1,231.26x = 1,698.17 × 858.83
  4. Step 4: Simplify right side
    1,231.26x = 1,458,426.56
  5. Step 5: Solve for x
    x = 1,458,426.56/1,231.26
  6. Step 6: Final answer
    x = 1,184.50

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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.