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Finding the Fourth Proportional to 490.86, 677.46 and 294.42

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Solution

The fourth proportional to 490.86, 677.46 and 294.42 is: 406.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.86 : 677.46 = 294.42 : x
  2. Step 2: Convert to fraction form
    490.86/677.46 = 294.42/x
  3. Step 3: Cross multiply
    490.86x = 677.46 × 294.42
  4. Step 4: Simplify right side
    490.86x = 199,457.77
  5. Step 5: Solve for x
    x = 199,457.77/490.86
  6. Step 6: Final answer
    x = 406.34

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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.