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Finding the Fourth Proportional to 579.42, 797.56 and 485.12

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Solution

The fourth proportional to 579.42, 797.56 and 485.12 is: 667.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.42 : 797.56 = 485.12 : x
  2. Step 2: Convert to fraction form
    579.42/797.56 = 485.12/x
  3. Step 3: Cross multiply
    579.42x = 797.56 × 485.12
  4. Step 4: Simplify right side
    579.42x = 386,913.09
  5. Step 5: Solve for x
    x = 386,913.09/579.42
  6. Step 6: Final answer
    x = 667.76

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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.