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Finding the Fourth Proportional to 380.69, 525.30 and 223.36

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Solution

The fourth proportional to 380.69, 525.30 and 223.36 is: 308.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.69 : 525.30 = 223.36 : x
  2. Step 2: Convert to fraction form
    380.69/525.30 = 223.36/x
  3. Step 3: Cross multiply
    380.69x = 525.30 × 223.36
  4. Step 4: Simplify right side
    380.69x = 117,331.01
  5. Step 5: Solve for x
    x = 117,331.01/380.69
  6. Step 6: Final answer
    x = 308.21

Related Problems

Find fourth proportional to 190.35, 262.65 and 111.68
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Double scale
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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.