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Finding the Fourth Proportional to 496.93, 685.43 and 289.93

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Solution

The fourth proportional to 496.93, 685.43 and 289.93 is: 399.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.93 : 685.43 = 289.93 : x
  2. Step 2: Convert to fraction form
    496.93/685.43 = 289.93/x
  3. Step 3: Cross multiply
    496.93x = 685.43 × 289.93
  4. Step 4: Simplify right side
    496.93x = 198,725.27
  5. Step 5: Solve for x
    x = 198,725.27/496.93
  6. Step 6: Final answer
    x = 399.91

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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.