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Finding the Fourth Proportional to 1,670, 2,503.49 and 791.96

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Solution

The fourth proportional to 1,670, 2,503.49 and 791.96 is: 1,187.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,670 : 2,503.49 = 791.96 : x
  2. Step 2: Convert to fraction form
    1,670/2,503.49 = 791.96/x
  3. Step 3: Cross multiply
    1,670x = 2,503.49 × 791.96
  4. Step 4: Simplify right side
    1,670x = 1,982,663.94
  5. Step 5: Solve for x
    x = 1,982,663.94/1,670
  6. Step 6: Final answer
    x = 1,187.22

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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.