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Finding the Fourth Proportional to 627.10, 939.86 and 319.04

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Solution

The fourth proportional to 627.10, 939.86 and 319.04 is: 478.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.10 : 939.86 = 319.04 : x
  2. Step 2: Convert to fraction form
    627.10/939.86 = 319.04/x
  3. Step 3: Cross multiply
    627.10x = 939.86 × 319.04
  4. Step 4: Simplify right side
    627.10x = 299,852.93
  5. Step 5: Solve for x
    x = 299,852.93/627.10
  6. Step 6: Final answer
    x = 478.16

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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.