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Finding the Fourth Proportional to 479.86, 661.84 and 322.67

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Solution

The fourth proportional to 479.86, 661.84 and 322.67 is: 445.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.86 : 661.84 = 322.67 : x
  2. Step 2: Convert to fraction form
    479.86/661.84 = 322.67/x
  3. Step 3: Cross multiply
    479.86x = 661.84 × 322.67
  4. Step 4: Simplify right side
    479.86x = 213,555.91
  5. Step 5: Solve for x
    x = 213,555.91/479.86
  6. Step 6: Final answer
    x = 445.04

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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.