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Finding the Fourth Proportional to 845.45, 1,166.38 and 550.61

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Solution

The fourth proportional to 845.45, 1,166.38 and 550.61 is: 759.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.45 : 1,166.38 = 550.61 : x
  2. Step 2: Convert to fraction form
    845.45/1,166.38 = 550.61/x
  3. Step 3: Cross multiply
    845.45x = 1,166.38 × 550.61
  4. Step 4: Simplify right side
    845.45x = 642,211.91
  5. Step 5: Solve for x
    x = 642,211.91/845.45
  6. Step 6: Final answer
    x = 759.61

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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.