Home / 1,489.38-2,053.50-1,208.58

Finding the Fourth Proportional to 1,489.38, 2,053.50 and 1,208.58

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Solution

The fourth proportional to 1,489.38, 2,053.50 and 1,208.58 is: 1,666.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.38 : 2,053.50 = 1,208.58 : x
  2. Step 2: Convert to fraction form
    1,489.38/2,053.50 = 1,208.58/x
  3. Step 3: Cross multiply
    1,489.38x = 2,053.50 × 1,208.58
  4. Step 4: Simplify right side
    1,489.38x = 2,481,819.03
  5. Step 5: Solve for x
    x = 2,481,819.03/1,489.38
  6. Step 6: Final answer
    x = 1,666.34

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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.