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Finding the Fourth Proportional to 264.34, 393.91 and 255.64

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Solution

The fourth proportional to 264.34, 393.91 and 255.64 is: 380.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.34 : 393.91 = 255.64 : x
  2. Step 2: Convert to fraction form
    264.34/393.91 = 255.64/x
  3. Step 3: Cross multiply
    264.34x = 393.91 × 255.64
  4. Step 4: Simplify right side
    264.34x = 100,699.15
  5. Step 5: Solve for x
    x = 100,699.15/264.34
  6. Step 6: Final answer
    x = 380.95

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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.