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Finding the Fourth Proportional to 299.03, 410.23 and 280.40

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Solution

The fourth proportional to 299.03, 410.23 and 280.40 is: 384.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.03 : 410.23 = 280.40 : x
  2. Step 2: Convert to fraction form
    299.03/410.23 = 280.40/x
  3. Step 3: Cross multiply
    299.03x = 410.23 × 280.40
  4. Step 4: Simplify right side
    299.03x = 115,028.49
  5. Step 5: Solve for x
    x = 115,028.49/299.03
  6. Step 6: Final answer
    x = 384.67

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.