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Finding the Fourth Proportional to 281.03, 421.95 and 250.70

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Solution

The fourth proportional to 281.03, 421.95 and 250.70 is: 376.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.03 : 421.95 = 250.70 : x
  2. Step 2: Convert to fraction form
    281.03/421.95 = 250.70/x
  3. Step 3: Cross multiply
    281.03x = 421.95 × 250.70
  4. Step 4: Simplify right side
    281.03x = 105,782.87
  5. Step 5: Solve for x
    x = 105,782.87/281.03
  6. Step 6: Final answer
    x = 376.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.