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Finding the Fourth Proportional to 288.05, 431.05 and 249.67

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Solution

The fourth proportional to 288.05, 431.05 and 249.67 is: 373.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.05 : 431.05 = 249.67 : x
  2. Step 2: Convert to fraction form
    288.05/431.05 = 249.67/x
  3. Step 3: Cross multiply
    288.05x = 431.05 × 249.67
  4. Step 4: Simplify right side
    288.05x = 107,620.25
  5. Step 5: Solve for x
    x = 107,620.25/288.05
  6. Step 6: Final answer
    x = 373.62

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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.