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Finding the Fourth Proportional to 290.70, 434.97 and 162.54

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Solution

The fourth proportional to 290.70, 434.97 and 162.54 is: 243.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.70 : 434.97 = 162.54 : x
  2. Step 2: Convert to fraction form
    290.70/434.97 = 162.54/x
  3. Step 3: Cross multiply
    290.70x = 434.97 × 162.54
  4. Step 4: Simplify right side
    290.70x = 70,700.02
  5. Step 5: Solve for x
    x = 70,700.02/290.70
  6. Step 6: Final answer
    x = 243.21

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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.