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Finding the Fourth Proportional to 202.89, 304.24 and 72.89

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Solution

The fourth proportional to 202.89, 304.24 and 72.89 is: 109.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.89 : 304.24 = 72.89 : x
  2. Step 2: Convert to fraction form
    202.89/304.24 = 72.89/x
  3. Step 3: Cross multiply
    202.89x = 304.24 × 72.89
  4. Step 4: Simplify right side
    202.89x = 22,176.05
  5. Step 5: Solve for x
    x = 22,176.05/202.89
  6. Step 6: Final answer
    x = 109.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.