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Finding the Fourth Proportional to 210.26, 290.16 and 122.98

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Solution

The fourth proportional to 210.26, 290.16 and 122.98 is: 169.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.26 : 290.16 = 122.98 : x
  2. Step 2: Convert to fraction form
    210.26/290.16 = 122.98/x
  3. Step 3: Cross multiply
    210.26x = 290.16 × 122.98
  4. Step 4: Simplify right side
    210.26x = 35,682.43
  5. Step 5: Solve for x
    x = 35,682.43/210.26
  6. Step 6: Final answer
    x = 169.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.