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Finding the Fourth Proportional to 389.09, 536.95 and 223.33

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Solution

The fourth proportional to 389.09, 536.95 and 223.33 is: 308.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.09 : 536.95 = 223.33 : x
  2. Step 2: Convert to fraction form
    389.09/536.95 = 223.33/x
  3. Step 3: Cross multiply
    389.09x = 536.95 × 223.33
  4. Step 4: Simplify right side
    389.09x = 119,915.93
  5. Step 5: Solve for x
    x = 119,915.93/389.09
  6. Step 6: Final answer
    x = 308.20

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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.