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Finding the Fourth Proportional to 1,644.13, 2,466.20 and 822.21

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Solution

The fourth proportional to 1,644.13, 2,466.20 and 822.21 is: 1,233.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,644.13 : 2,466.20 = 822.21 : x
  2. Step 2: Convert to fraction form
    1,644.13/2,466.20 = 822.21/x
  3. Step 3: Cross multiply
    1,644.13x = 2,466.20 × 822.21
  4. Step 4: Simplify right side
    1,644.13x = 2,027,739.82
  5. Step 5: Solve for x
    x = 2,027,739.82/1,644.13
  6. Step 6: Final answer
    x = 1,233.32

Related Problems

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Half scale
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Double scale
Find fourth proportional to 1,645.13, 2,467.70 and 823.21
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.