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Finding the Fourth Proportional to 628.88, 942.52 and 316.64

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Solution

The fourth proportional to 628.88, 942.52 and 316.64 is: 474.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.88 : 942.52 = 316.64 : x
  2. Step 2: Convert to fraction form
    628.88/942.52 = 316.64/x
  3. Step 3: Cross multiply
    628.88x = 942.52 × 316.64
  4. Step 4: Simplify right side
    628.88x = 298,439.53
  5. Step 5: Solve for x
    x = 298,439.53/628.88
  6. Step 6: Final answer
    x = 474.56

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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.