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Finding the Fourth Proportional to 1,669.85, 2,505.50 and 889.63

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Solution

The fourth proportional to 1,669.85, 2,505.50 and 889.63 is: 1,334.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,669.85 : 2,505.50 = 889.63 : x
  2. Step 2: Convert to fraction form
    1,669.85/2,505.50 = 889.63/x
  3. Step 3: Cross multiply
    1,669.85x = 2,505.50 × 889.63
  4. Step 4: Simplify right side
    1,669.85x = 2,228,960.59
  5. Step 5: Solve for x
    x = 2,228,960.59/1,669.85
  6. Step 6: Final answer
    x = 1,334.83

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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.