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Finding the Fourth Proportional to 368.87, 553.52 and 137.92

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Solution

The fourth proportional to 368.87, 553.52 and 137.92 is: 206.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.87 : 553.52 = 137.92 : x
  2. Step 2: Convert to fraction form
    368.87/553.52 = 137.92/x
  3. Step 3: Cross multiply
    368.87x = 553.52 × 137.92
  4. Step 4: Simplify right side
    368.87x = 76,340.79
  5. Step 5: Solve for x
    x = 76,340.79/368.87
  6. Step 6: Final answer
    x = 206.96

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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.