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Finding the Fourth Proportional to 319.42, 479.24 and 262.27

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Solution

The fourth proportional to 319.42, 479.24 and 262.27 is: 393.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.42 : 479.24 = 262.27 : x
  2. Step 2: Convert to fraction form
    319.42/479.24 = 262.27/x
  3. Step 3: Cross multiply
    319.42x = 479.24 × 262.27
  4. Step 4: Simplify right side
    319.42x = 125,688.96
  5. Step 5: Solve for x
    x = 125,688.96/319.42
  6. Step 6: Final answer
    x = 393.49

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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.