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Finding the Fourth Proportional to 574.42, 792.67 and 312.43

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Solution

The fourth proportional to 574.42, 792.67 and 312.43 is: 431.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.42 : 792.67 = 312.43 : x
  2. Step 2: Convert to fraction form
    574.42/792.67 = 312.43/x
  3. Step 3: Cross multiply
    574.42x = 792.67 × 312.43
  4. Step 4: Simplify right side
    574.42x = 247,653.89
  5. Step 5: Solve for x
    x = 247,653.89/574.42
  6. Step 6: Final answer
    x = 431.14

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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.