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Finding the Fourth Proportional to 210.31, 290.27 and 136.60

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Solution

The fourth proportional to 210.31, 290.27 and 136.60 is: 188.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.31 : 290.27 = 136.60 : x
  2. Step 2: Convert to fraction form
    210.31/290.27 = 136.60/x
  3. Step 3: Cross multiply
    210.31x = 290.27 × 136.60
  4. Step 4: Simplify right side
    210.31x = 39,650.50
  5. Step 5: Solve for x
    x = 39,650.50/210.31
  6. Step 6: Final answer
    x = 188.54

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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.