Home / 1,208.36-1,669.10-999.38

Finding the Fourth Proportional to 1,208.36, 1,669.10 and 999.38

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Solution

The fourth proportional to 1,208.36, 1,669.10 and 999.38 is: 1,380.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.36 : 1,669.10 = 999.38 : x
  2. Step 2: Convert to fraction form
    1,208.36/1,669.10 = 999.38/x
  3. Step 3: Cross multiply
    1,208.36x = 1,669.10 × 999.38
  4. Step 4: Simplify right side
    1,208.36x = 1,668,065.16
  5. Step 5: Solve for x
    x = 1,668,065.16/1,208.36
  6. Step 6: Final answer
    x = 1,380.44

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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.