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Finding the Fourth Proportional to 368.09, 551.81 and 148.69

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Solution

The fourth proportional to 368.09, 551.81 and 148.69 is: 222.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.09 : 551.81 = 148.69 : x
  2. Step 2: Convert to fraction form
    368.09/551.81 = 148.69/x
  3. Step 3: Cross multiply
    368.09x = 551.81 × 148.69
  4. Step 4: Simplify right side
    368.09x = 82,046.59
  5. Step 5: Solve for x
    x = 82,046.59/368.09
  6. Step 6: Final answer
    x = 222.90

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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.