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Finding the Fourth Proportional to 496.17, 684.40 and 319.36

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Solution

The fourth proportional to 496.17, 684.40 and 319.36 is: 440.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.17 : 684.40 = 319.36 : x
  2. Step 2: Convert to fraction form
    496.17/684.40 = 319.36/x
  3. Step 3: Cross multiply
    496.17x = 684.40 × 319.36
  4. Step 4: Simplify right side
    496.17x = 218,567.43
  5. Step 5: Solve for x
    x = 218,567.43/496.17
  6. Step 6: Final answer
    x = 440.51

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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.