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Finding the Fourth Proportional to 886.12, 1,223.01 and 550.21

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Solution

The fourth proportional to 886.12, 1,223.01 and 550.21 is: 759.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.12 : 1,223.01 = 550.21 : x
  2. Step 2: Convert to fraction form
    886.12/1,223.01 = 550.21/x
  3. Step 3: Cross multiply
    886.12x = 1,223.01 × 550.21
  4. Step 4: Simplify right side
    886.12x = 672,912.33
  5. Step 5: Solve for x
    x = 672,912.33/886.12
  6. Step 6: Final answer
    x = 759.39

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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.