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Finding the Fourth Proportional to 281.06, 387.91 and 164.60

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Solution

The fourth proportional to 281.06, 387.91 and 164.60 is: 227.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.06 : 387.91 = 164.60 : x
  2. Step 2: Convert to fraction form
    281.06/387.91 = 164.60/x
  3. Step 3: Cross multiply
    281.06x = 387.91 × 164.60
  4. Step 4: Simplify right side
    281.06x = 63,849.99
  5. Step 5: Solve for x
    x = 63,849.99/281.06
  6. Step 6: Final answer
    x = 227.18

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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.