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Finding the Fourth Proportional to 628.60, 942.90 and 195.80

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Solution

The fourth proportional to 628.60, 942.90 and 195.80 is: 293.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.60 : 942.90 = 195.80 : x
  2. Step 2: Convert to fraction form
    628.60/942.90 = 195.80/x
  3. Step 3: Cross multiply
    628.60x = 942.90 × 195.80
  4. Step 4: Simplify right side
    628.60x = 184,619.82
  5. Step 5: Solve for x
    x = 184,619.82/628.60
  6. Step 6: Final answer
    x = 293.70

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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.