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Finding the Fourth Proportional to 845.19, 1,165.66 and 550.55

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Solution

The fourth proportional to 845.19, 1,165.66 and 550.55 is: 759.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.19 : 1,165.66 = 550.55 : x
  2. Step 2: Convert to fraction form
    845.19/1,165.66 = 550.55/x
  3. Step 3: Cross multiply
    845.19x = 1,165.66 × 550.55
  4. Step 4: Simplify right side
    845.19x = 641,755.65
  5. Step 5: Solve for x
    x = 641,755.65/845.19
  6. Step 6: Final answer
    x = 759.30

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Half scale
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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.