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Finding the Fourth Proportional to 678.00, 936.31 and 579.18

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Solution

The fourth proportional to 678.00, 936.31 and 579.18 is: 799.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    678.00 : 936.31 = 579.18 : x
  2. Step 2: Convert to fraction form
    678.00/936.31 = 579.18/x
  3. Step 3: Cross multiply
    678.00x = 936.31 × 579.18
  4. Step 4: Simplify right side
    678.00x = 542,295.17
  5. Step 5: Solve for x
    x = 542,295.17/678.00
  6. Step 6: Final answer
    x = 799.84

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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.