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Finding the Fourth Proportional to 845.24, 1,166.46 and 491.20

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Solution

The fourth proportional to 845.24, 1,166.46 and 491.20 is: 677.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.24 : 1,166.46 = 491.20 : x
  2. Step 2: Convert to fraction form
    845.24/1,166.46 = 491.20/x
  3. Step 3: Cross multiply
    845.24x = 1,166.46 × 491.20
  4. Step 4: Simplify right side
    845.24x = 572,965.15
  5. Step 5: Solve for x
    x = 572,965.15/845.24
  6. Step 6: Final answer
    x = 677.87

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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.