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Finding the Fourth Proportional to 223.08, 306.21 and 210.93

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Solution

The fourth proportional to 223.08, 306.21 and 210.93 is: 289.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.08 : 306.21 = 210.93 : x
  2. Step 2: Convert to fraction form
    223.08/306.21 = 210.93/x
  3. Step 3: Cross multiply
    223.08x = 306.21 × 210.93
  4. Step 4: Simplify right side
    223.08x = 64,588.88
  5. Step 5: Solve for x
    x = 64,588.88/223.08
  6. Step 6: Final answer
    x = 289.53

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.