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Finding the Fourth Proportional to 263.81, 393.55 and 245.16

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Solution

The fourth proportional to 263.81, 393.55 and 245.16 is: 365.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.81 : 393.55 = 245.16 : x
  2. Step 2: Convert to fraction form
    263.81/393.55 = 245.16/x
  3. Step 3: Cross multiply
    263.81x = 393.55 × 245.16
  4. Step 4: Simplify right side
    263.81x = 96,481.49
  5. Step 5: Solve for x
    x = 96,481.49/263.81
  6. Step 6: Final answer
    x = 365.73

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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.