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Finding the Fourth Proportional to 210.22, 290.12 and 136.60

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Solution

The fourth proportional to 210.22, 290.12 and 136.60 is: 188.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.22 : 290.12 = 136.60 : x
  2. Step 2: Convert to fraction form
    210.22/290.12 = 136.60/x
  3. Step 3: Cross multiply
    210.22x = 290.12 × 136.60
  4. Step 4: Simplify right side
    210.22x = 39,630.39
  5. Step 5: Solve for x
    x = 39,630.39/210.22
  6. Step 6: Final answer
    x = 188.52

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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.