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Finding the Fourth Proportional to 494.84, 682.88 and 298.31

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Solution

The fourth proportional to 494.84, 682.88 and 298.31 is: 411.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.84 : 682.88 = 298.31 : x
  2. Step 2: Convert to fraction form
    494.84/682.88 = 298.31/x
  3. Step 3: Cross multiply
    494.84x = 682.88 × 298.31
  4. Step 4: Simplify right side
    494.84x = 203,710.15
  5. Step 5: Solve for x
    x = 203,710.15/494.84
  6. Step 6: Final answer
    x = 411.67

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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.