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Finding the Fourth Proportional to 558.12, 769.98 and 351

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Solution

The fourth proportional to 558.12, 769.98 and 351 is: 484.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.12 : 769.98 = 351 : x
  2. Step 2: Convert to fraction form
    558.12/769.98 = 351/x
  3. Step 3: Cross multiply
    558.12x = 769.98 × 351
  4. Step 4: Simplify right side
    558.12x = 270,262.98
  5. Step 5: Solve for x
    x = 270,262.98/558.12
  6. Step 6: Final answer
    x = 484.24

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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.