Home / 1,327.47-1,990.75-669.09

Finding the Fourth Proportional to 1,327.47, 1,990.75 and 669.09

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Solution

The fourth proportional to 1,327.47, 1,990.75 and 669.09 is: 1,003.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.47 : 1,990.75 = 669.09 : x
  2. Step 2: Convert to fraction form
    1,327.47/1,990.75 = 669.09/x
  3. Step 3: Cross multiply
    1,327.47x = 1,990.75 × 669.09
  4. Step 4: Simplify right side
    1,327.47x = 1,331,996.08
  5. Step 5: Solve for x
    x = 1,331,996.08/1,327.47
  6. Step 6: Final answer
    x = 1,003.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.