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Finding the Fourth Proportional to 479.67, 661.86 and 293.21

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Solution

The fourth proportional to 479.67, 661.86 and 293.21 is: 404.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.67 : 661.86 = 293.21 : x
  2. Step 2: Convert to fraction form
    479.67/661.86 = 293.21/x
  3. Step 3: Cross multiply
    479.67x = 661.86 × 293.21
  4. Step 4: Simplify right side
    479.67x = 194,067.69
  5. Step 5: Solve for x
    x = 194,067.69/479.67
  6. Step 6: Final answer
    x = 404.58

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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.