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Finding the Fourth Proportional to 368.96, 553.50 and 137.88

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Solution

The fourth proportional to 368.96, 553.50 and 137.88 is: 206.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.96 : 553.50 = 137.88 : x
  2. Step 2: Convert to fraction form
    368.96/553.50 = 137.88/x
  3. Step 3: Cross multiply
    368.96x = 553.50 × 137.88
  4. Step 4: Simplify right side
    368.96x = 76,316.58
  5. Step 5: Solve for x
    x = 76,316.58/368.96
  6. Step 6: Final answer
    x = 206.84

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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.