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Finding the Fourth Proportional to 845.38, 1,166.44 and 491.29

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Solution

The fourth proportional to 845.38, 1,166.44 and 491.29 is: 677.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.38 : 1,166.44 = 491.29 : x
  2. Step 2: Convert to fraction form
    845.38/1,166.44 = 491.29/x
  3. Step 3: Cross multiply
    845.38x = 1,166.44 × 491.29
  4. Step 4: Simplify right side
    845.38x = 573,060.31
  5. Step 5: Solve for x
    x = 573,060.31/845.38
  6. Step 6: Final answer
    x = 677.87

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Double scale
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1.5x scale

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.