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Finding the Fourth Proportional to 574.70, 793.09 and 312.71

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Solution

The fourth proportional to 574.70, 793.09 and 312.71 is: 431.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.70 : 793.09 = 312.71 : x
  2. Step 2: Convert to fraction form
    574.70/793.09 = 312.71/x
  3. Step 3: Cross multiply
    574.70x = 793.09 × 312.71
  4. Step 4: Simplify right side
    574.70x = 248,010.09
  5. Step 5: Solve for x
    x = 248,010.09/574.70
  6. Step 6: Final answer
    x = 431.55

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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.