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Finding the Fourth Proportional to 579.64, 799.48 and 402.79

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Solution

The fourth proportional to 579.64, 799.48 and 402.79 is: 555.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.64 : 799.48 = 402.79 : x
  2. Step 2: Convert to fraction form
    579.64/799.48 = 402.79/x
  3. Step 3: Cross multiply
    579.64x = 799.48 × 402.79
  4. Step 4: Simplify right side
    579.64x = 322,022.55
  5. Step 5: Solve for x
    x = 322,022.55/579.64
  6. Step 6: Final answer
    x = 555.56

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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.