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Finding the Fourth Proportional to 418.50, 627.54 and 144.49

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Solution

The fourth proportional to 418.50, 627.54 and 144.49 is: 216.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.50 : 627.54 = 144.49 : x
  2. Step 2: Convert to fraction form
    418.50/627.54 = 144.49/x
  3. Step 3: Cross multiply
    418.50x = 627.54 × 144.49
  4. Step 4: Simplify right side
    418.50x = 90,675.37
  5. Step 5: Solve for x
    x = 90,675.37/418.50
  6. Step 6: Final answer
    x = 216.67

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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.