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Finding the Fourth Proportional to 845.38, 1,166.43 and 491.09

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Solution

The fourth proportional to 845.38, 1,166.43 and 491.09 is: 677.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.38 : 1,166.43 = 491.09 : x
  2. Step 2: Convert to fraction form
    845.38/1,166.43 = 491.09/x
  3. Step 3: Cross multiply
    845.38x = 1,166.43 × 491.09
  4. Step 4: Simplify right side
    845.38x = 572,822.11
  5. Step 5: Solve for x
    x = 572,822.11/845.38
  6. Step 6: Final answer
    x = 677.59

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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.