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Finding the Fourth Proportional to 678.44, 935.61 and 482.60

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Solution

The fourth proportional to 678.44, 935.61 and 482.60 is: 665.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    678.44 : 935.61 = 482.60 : x
  2. Step 2: Convert to fraction form
    678.44/935.61 = 482.60/x
  3. Step 3: Cross multiply
    678.44x = 935.61 × 482.60
  4. Step 4: Simplify right side
    678.44x = 451,525.39
  5. Step 5: Solve for x
    x = 451,525.39/678.44
  6. Step 6: Final answer
    x = 665.53

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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.