Home / 1,208.49-1,669.26-999.51

Finding the Fourth Proportional to 1,208.49, 1,669.26 and 999.51

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Solution

The fourth proportional to 1,208.49, 1,669.26 and 999.51 is: 1,380.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.49 : 1,669.26 = 999.51 : x
  2. Step 2: Convert to fraction form
    1,208.49/1,669.26 = 999.51/x
  3. Step 3: Cross multiply
    1,208.49x = 1,669.26 × 999.51
  4. Step 4: Simplify right side
    1,208.49x = 1,668,439.55
  5. Step 5: Solve for x
    x = 1,668,439.55/1,208.49
  6. Step 6: Final answer
    x = 1,380.60

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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.