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Finding the Fourth Proportional to 627.68, 941.56 and 319.16

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Solution

The fourth proportional to 627.68, 941.56 and 319.16 is: 478.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.68 : 941.56 = 319.16 : x
  2. Step 2: Convert to fraction form
    627.68/941.56 = 319.16/x
  3. Step 3: Cross multiply
    627.68x = 941.56 × 319.16
  4. Step 4: Simplify right side
    627.68x = 300,509.85
  5. Step 5: Solve for x
    x = 300,509.85/627.68
  6. Step 6: Final answer
    x = 478.76

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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.