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Finding the Fourth Proportional to 263.21, 392.22 and 254.49

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Solution

The fourth proportional to 263.21, 392.22 and 254.49 is: 379.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.21 : 392.22 = 254.49 : x
  2. Step 2: Convert to fraction form
    263.21/392.22 = 254.49/x
  3. Step 3: Cross multiply
    263.21x = 392.22 × 254.49
  4. Step 4: Simplify right side
    263.21x = 99,816.07
  5. Step 5: Solve for x
    x = 99,816.07/263.21
  6. Step 6: Final answer
    x = 379.23

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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.