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Finding the Fourth Proportional to 574.86, 792.94 and 478.79

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Solution

The fourth proportional to 574.86, 792.94 and 478.79 is: 660.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.86 : 792.94 = 478.79 : x
  2. Step 2: Convert to fraction form
    574.86/792.94 = 478.79/x
  3. Step 3: Cross multiply
    574.86x = 792.94 × 478.79
  4. Step 4: Simplify right side
    574.86x = 379,651.74
  5. Step 5: Solve for x
    x = 379,651.74/574.86
  6. Step 6: Final answer
    x = 660.43

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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.