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Finding the Fourth Proportional to 408.79, 564.36 and 298.84

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Solution

The fourth proportional to 408.79, 564.36 and 298.84 is: 412.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.79 : 564.36 = 298.84 : x
  2. Step 2: Convert to fraction form
    408.79/564.36 = 298.84/x
  3. Step 3: Cross multiply
    408.79x = 564.36 × 298.84
  4. Step 4: Simplify right side
    408.79x = 168,653.34
  5. Step 5: Solve for x
    x = 168,653.34/408.79
  6. Step 6: Final answer
    x = 412.57

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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.