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Finding the Fourth Proportional to 447.80, 670.62 and 317.48

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Solution

The fourth proportional to 447.80, 670.62 and 317.48 is: 475.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.80 : 670.62 = 317.48 : x
  2. Step 2: Convert to fraction form
    447.80/670.62 = 317.48/x
  3. Step 3: Cross multiply
    447.80x = 670.62 × 317.48
  4. Step 4: Simplify right side
    447.80x = 212,908.44
  5. Step 5: Solve for x
    x = 212,908.44/447.80
  6. Step 6: Final answer
    x = 475.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.