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Finding the Fourth Proportional to 496.94, 685.80 and 322.78

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Solution

The fourth proportional to 496.94, 685.80 and 322.78 is: 445.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.94 : 685.80 = 322.78 : x
  2. Step 2: Convert to fraction form
    496.94/685.80 = 322.78/x
  3. Step 3: Cross multiply
    496.94x = 685.80 × 322.78
  4. Step 4: Simplify right side
    496.94x = 221,362.52
  5. Step 5: Solve for x
    x = 221,362.52/496.94
  6. Step 6: Final answer
    x = 445.45

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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.