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Finding the Fourth Proportional to 293.86, 440.88 and 287.72

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Solution

The fourth proportional to 293.86, 440.88 and 287.72 is: 431.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.86 : 440.88 = 287.72 : x
  2. Step 2: Convert to fraction form
    293.86/440.88 = 287.72/x
  3. Step 3: Cross multiply
    293.86x = 440.88 × 287.72
  4. Step 4: Simplify right side
    293.86x = 126,849.99
  5. Step 5: Solve for x
    x = 126,849.99/293.86
  6. Step 6: Final answer
    x = 431.67

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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.