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Finding the Fourth Proportional to 281.90, 389.21 and 177.03

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Solution

The fourth proportional to 281.90, 389.21 and 177.03 is: 244.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.90 : 389.21 = 177.03 : x
  2. Step 2: Convert to fraction form
    281.90/389.21 = 177.03/x
  3. Step 3: Cross multiply
    281.90x = 389.21 × 177.03
  4. Step 4: Simplify right side
    281.90x = 68,900.96
  5. Step 5: Solve for x
    x = 68,900.96/281.90
  6. Step 6: Final answer
    x = 244.41

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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.