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Finding the Fourth Proportional to 368.90, 553.38 and 186.18

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Solution

The fourth proportional to 368.90, 553.38 and 186.18 is: 279.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.90 : 553.38 = 186.18 : x
  2. Step 2: Convert to fraction form
    368.90/553.38 = 186.18/x
  3. Step 3: Cross multiply
    368.90x = 553.38 × 186.18
  4. Step 4: Simplify right side
    368.90x = 103,028.29
  5. Step 5: Solve for x
    x = 103,028.29/368.90
  6. Step 6: Final answer
    x = 279.29

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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.