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Finding the Fourth Proportional to 368.79, 553.19 and 186.13

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Solution

The fourth proportional to 368.79, 553.19 and 186.13 is: 279.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.79 : 553.19 = 186.13 : x
  2. Step 2: Convert to fraction form
    368.79/553.19 = 186.13/x
  3. Step 3: Cross multiply
    368.79x = 553.19 × 186.13
  4. Step 4: Simplify right side
    368.79x = 102,965.25
  5. Step 5: Solve for x
    x = 102,965.25/368.79
  6. Step 6: Final answer
    x = 279.20

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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.