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Finding the Fourth Proportional to 574.92, 792.90 and 388.35

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Solution

The fourth proportional to 574.92, 792.90 and 388.35 is: 535.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.92 : 792.90 = 388.35 : x
  2. Step 2: Convert to fraction form
    574.92/792.90 = 388.35/x
  3. Step 3: Cross multiply
    574.92x = 792.90 × 388.35
  4. Step 4: Simplify right side
    574.92x = 307,922.72
  5. Step 5: Solve for x
    x = 307,922.72/574.92
  6. Step 6: Final answer
    x = 535.59

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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.