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Finding the Fourth Proportional to 262.85, 394.26 and 70.47

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Solution

The fourth proportional to 262.85, 394.26 and 70.47 is: 105.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.85 : 394.26 = 70.47 : x
  2. Step 2: Convert to fraction form
    262.85/394.26 = 70.47/x
  3. Step 3: Cross multiply
    262.85x = 394.26 × 70.47
  4. Step 4: Simplify right side
    262.85x = 27,784.49
  5. Step 5: Solve for x
    x = 27,784.49/262.85
  6. Step 6: Final answer
    x = 105.71

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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.