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Finding the Fourth Proportional to 479.07, 661.22 and 304.38

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Solution

The fourth proportional to 479.07, 661.22 and 304.38 is: 420.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.07 : 661.22 = 304.38 : x
  2. Step 2: Convert to fraction form
    479.07/661.22 = 304.38/x
  3. Step 3: Cross multiply
    479.07x = 661.22 × 304.38
  4. Step 4: Simplify right side
    479.07x = 201,262.14
  5. Step 5: Solve for x
    x = 201,262.14/479.07
  6. Step 6: Final answer
    x = 420.11

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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.