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Finding the Fourth Proportional to 281.88, 420.50 and 270.22

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Solution

The fourth proportional to 281.88, 420.50 and 270.22 is: 403.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.88 : 420.50 = 270.22 : x
  2. Step 2: Convert to fraction form
    281.88/420.50 = 270.22/x
  3. Step 3: Cross multiply
    281.88x = 420.50 × 270.22
  4. Step 4: Simplify right side
    281.88x = 113,626.12
  5. Step 5: Solve for x
    x = 113,626.12/281.88
  6. Step 6: Final answer
    x = 403.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.