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Finding the Fourth Proportional to 349.69, 482.46 and 305.80

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Solution

The fourth proportional to 349.69, 482.46 and 305.80 is: 421.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.69 : 482.46 = 305.80 : x
  2. Step 2: Convert to fraction form
    349.69/482.46 = 305.80/x
  3. Step 3: Cross multiply
    349.69x = 482.46 × 305.80
  4. Step 4: Simplify right side
    349.69x = 147,536.27
  5. Step 5: Solve for x
    x = 147,536.27/349.69
  6. Step 6: Final answer
    x = 421.91

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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.