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Finding the Fourth Proportional to 265.26, 398.03 and 126.41

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Solution

The fourth proportional to 265.26, 398.03 and 126.41 is: 189.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.26 : 398.03 = 126.41 : x
  2. Step 2: Convert to fraction form
    265.26/398.03 = 126.41/x
  3. Step 3: Cross multiply
    265.26x = 398.03 × 126.41
  4. Step 4: Simplify right side
    265.26x = 50,312.35
  5. Step 5: Solve for x
    x = 50,312.35/265.26
  6. Step 6: Final answer
    x = 189.67

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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.