Home / 1,489.27-2,054.43-1,209.82

Finding the Fourth Proportional to 1,489.27, 2,054.43 and 1,209.82

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Solution

The fourth proportional to 1,489.27, 2,054.43 and 1,209.82 is: 1,668.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.27 : 2,054.43 = 1,209.82 : x
  2. Step 2: Convert to fraction form
    1,489.27/2,054.43 = 1,209.82/x
  3. Step 3: Cross multiply
    1,489.27x = 2,054.43 × 1,209.82
  4. Step 4: Simplify right side
    1,489.27x = 2,485,490.50
  5. Step 5: Solve for x
    x = 2,485,490.50/1,489.27
  6. Step 6: Final answer
    x = 1,668.93

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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.