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Finding the Fourth Proportional to 494.02, 681.74 and 319.36

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Solution

The fourth proportional to 494.02, 681.74 and 319.36 is: 440.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.02 : 681.74 = 319.36 : x
  2. Step 2: Convert to fraction form
    494.02/681.74 = 319.36/x
  3. Step 3: Cross multiply
    494.02x = 681.74 × 319.36
  4. Step 4: Simplify right side
    494.02x = 217,720.49
  5. Step 5: Solve for x
    x = 217,720.49/494.02
  6. Step 6: Final answer
    x = 440.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.