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Finding the Fourth Proportional to 260.77, 360.11 and 223.21

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Solution

The fourth proportional to 260.77, 360.11 and 223.21 is: 308.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.77 : 360.11 = 223.21 : x
  2. Step 2: Convert to fraction form
    260.77/360.11 = 223.21/x
  3. Step 3: Cross multiply
    260.77x = 360.11 × 223.21
  4. Step 4: Simplify right side
    260.77x = 80,379.81
  5. Step 5: Solve for x
    x = 80,379.81/260.77
  6. Step 6: Final answer
    x = 308.24

Related Problems

Find fourth proportional to 130.38, 180.06 and 111.60
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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.