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Finding the Fourth Proportional to 210.22, 290.03 and 127.31

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Solution

The fourth proportional to 210.22, 290.03 and 127.31 is: 175.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.22 : 290.03 = 127.31 : x
  2. Step 2: Convert to fraction form
    210.22/290.03 = 127.31/x
  3. Step 3: Cross multiply
    210.22x = 290.03 × 127.31
  4. Step 4: Simplify right side
    210.22x = 36,921.63
  5. Step 5: Solve for x
    x = 36,921.63/210.22
  6. Step 6: Final answer
    x = 175.64

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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.