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Finding the Fourth Proportional to 368.55, 552.81 and 186.09

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Solution

The fourth proportional to 368.55, 552.81 and 186.09 is: 279.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.55 : 552.81 = 186.09 : x
  2. Step 2: Convert to fraction form
    368.55/552.81 = 186.09/x
  3. Step 3: Cross multiply
    368.55x = 552.81 × 186.09
  4. Step 4: Simplify right side
    368.55x = 102,872.41
  5. Step 5: Solve for x
    x = 102,872.41/368.55
  6. Step 6: Final answer
    x = 279.13

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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.