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Finding the Fourth Proportional to 677.70, 935.28 and 579.42

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Solution

The fourth proportional to 677.70, 935.28 and 579.42 is: 799.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.70 : 935.28 = 579.42 : x
  2. Step 2: Convert to fraction form
    677.70/935.28 = 579.42/x
  3. Step 3: Cross multiply
    677.70x = 935.28 × 579.42
  4. Step 4: Simplify right side
    677.70x = 541,919.94
  5. Step 5: Solve for x
    x = 541,919.94/677.70
  6. Step 6: Final answer
    x = 799.65

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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.