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Finding the Fourth Proportional to 496.93, 685.80 and 287.18

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Solution

The fourth proportional to 496.93, 685.80 and 287.18 is: 396.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.93 : 685.80 = 287.18 : x
  2. Step 2: Convert to fraction form
    496.93/685.80 = 287.18/x
  3. Step 3: Cross multiply
    496.93x = 685.80 × 287.18
  4. Step 4: Simplify right side
    496.93x = 196,943.18
  5. Step 5: Solve for x
    x = 196,943.18/496.93
  6. Step 6: Final answer
    x = 396.32

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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.