Home / 1,122.23-1,668.80-1,087.58

Finding the Fourth Proportional to 1,122.23, 1,668.80 and 1,087.58

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Solution

The fourth proportional to 1,122.23, 1,668.80 and 1,087.58 is: 1,617.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.23 : 1,668.80 = 1,087.58 : x
  2. Step 2: Convert to fraction form
    1,122.23/1,668.80 = 1,087.58/x
  3. Step 3: Cross multiply
    1,122.23x = 1,668.80 × 1,087.58
  4. Step 4: Simplify right side
    1,122.23x = 1,814,943.80
  5. Step 5: Solve for x
    x = 1,814,943.80/1,122.23
  6. Step 6: Final answer
    x = 1,617.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.