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Finding the Fourth Proportional to 389.13, 536.98 and 223.34

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Solution

The fourth proportional to 389.13, 536.98 and 223.34 is: 308.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.13 : 536.98 = 223.34 : x
  2. Step 2: Convert to fraction form
    389.13/536.98 = 223.34/x
  3. Step 3: Cross multiply
    389.13x = 536.98 × 223.34
  4. Step 4: Simplify right side
    389.13x = 119,929.11
  5. Step 5: Solve for x
    x = 119,929.11/389.13
  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.