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Finding the Fourth Proportional to 281.03, 420.54 and 242.96

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Solution

The fourth proportional to 281.03, 420.54 and 242.96 is: 363.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.03 : 420.54 = 242.96 : x
  2. Step 2: Convert to fraction form
    281.03/420.54 = 242.96/x
  3. Step 3: Cross multiply
    281.03x = 420.54 × 242.96
  4. Step 4: Simplify right side
    281.03x = 102,172.30
  5. Step 5: Solve for x
    x = 102,172.30/281.03
  6. Step 6: Final answer
    x = 363.57

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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.