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Finding the Fourth Proportional to 627.12, 939.16 and 443.68

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Solution

The fourth proportional to 627.12, 939.16 and 443.68 is: 664.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.12 : 939.16 = 443.68 : x
  2. Step 2: Convert to fraction form
    627.12/939.16 = 443.68/x
  3. Step 3: Cross multiply
    627.12x = 939.16 × 443.68
  4. Step 4: Simplify right side
    627.12x = 416,686.51
  5. Step 5: Solve for x
    x = 416,686.51/627.12
  6. Step 6: Final answer
    x = 664.44

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Double scale
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1.5x scale

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.