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Finding the Fourth Proportional to 389.03, 536.87 and 223.24

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Solution

The fourth proportional to 389.03, 536.87 and 223.24 is: 308.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.03 : 536.87 = 223.24 : x
  2. Step 2: Convert to fraction form
    389.03/536.87 = 223.24/x
  3. Step 3: Cross multiply
    389.03x = 536.87 × 223.24
  4. Step 4: Simplify right side
    389.03x = 119,850.86
  5. Step 5: Solve for x
    x = 119,850.86/389.03
  6. Step 6: Final answer
    x = 308.08

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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.