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Finding the Fourth Proportional to 628.77, 942.93 and 217.80

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Solution

The fourth proportional to 628.77, 942.93 and 217.80 is: 326.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.77 : 942.93 = 217.80 : x
  2. Step 2: Convert to fraction form
    628.77/942.93 = 217.80/x
  3. Step 3: Cross multiply
    628.77x = 942.93 × 217.80
  4. Step 4: Simplify right side
    628.77x = 205,370.15
  5. Step 5: Solve for x
    x = 205,370.15/628.77
  6. Step 6: Final answer
    x = 326.62

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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.