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Finding the Fourth Proportional to 574.54, 792.85 and 312.55

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Solution

The fourth proportional to 574.54, 792.85 and 312.55 is: 431.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.54 : 792.85 = 312.55 : x
  2. Step 2: Convert to fraction form
    574.54/792.85 = 312.55/x
  3. Step 3: Cross multiply
    574.54x = 792.85 × 312.55
  4. Step 4: Simplify right side
    574.54x = 247,805.27
  5. Step 5: Solve for x
    x = 247,805.27/574.54
  6. Step 6: Final answer
    x = 431.31

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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.