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Finding the Fourth Proportional to 265, 396.42 and 263.20

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Solution

The fourth proportional to 265, 396.42 and 263.20 is: 393.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    265 : 396.42 = 263.20 : x
  2. Step 2: Convert to fraction form
    265/396.42 = 263.20/x
  3. Step 3: Cross multiply
    265x = 396.42 × 263.20
  4. Step 4: Simplify right side
    265x = 104,337.74
  5. Step 5: Solve for x
    x = 104,337.74/265
  6. Step 6: Final answer
    x = 393.73

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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.