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Finding the Fourth Proportional to 389.08, 536.93 and 223.29

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Solution

The fourth proportional to 389.08, 536.93 and 223.29 is: 308.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.08 : 536.93 = 223.29 : x
  2. Step 2: Convert to fraction form
    389.08/536.93 = 223.29/x
  3. Step 3: Cross multiply
    389.08x = 536.93 × 223.29
  4. Step 4: Simplify right side
    389.08x = 119,891.10
  5. Step 5: Solve for x
    x = 119,891.10/389.08
  6. Step 6: Final answer
    x = 308.14

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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.