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Finding the Fourth Proportional to 376.22, 518.86 and 317.50

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Solution

The fourth proportional to 376.22, 518.86 and 317.50 is: 437.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.22 : 518.86 = 317.50 : x
  2. Step 2: Convert to fraction form
    376.22/518.86 = 317.50/x
  3. Step 3: Cross multiply
    376.22x = 518.86 × 317.50
  4. Step 4: Simplify right side
    376.22x = 164,738.05
  5. Step 5: Solve for x
    x = 164,738.05/376.22
  6. Step 6: Final answer
    x = 437.88

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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.