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Finding the Fourth Proportional to 290.13, 434.62 and 168

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Solution

The fourth proportional to 290.13, 434.62 and 168 is: 251.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.13 : 434.62 = 168 : x
  2. Step 2: Convert to fraction form
    290.13/434.62 = 168/x
  3. Step 3: Cross multiply
    290.13x = 434.62 × 168
  4. Step 4: Simplify right side
    290.13x = 73,016.16
  5. Step 5: Solve for x
    x = 73,016.16/290.13
  6. Step 6: Final answer
    x = 251.67

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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.