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Finding the Fourth Proportional to 667.36, 995.16 and 621.19

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Solution

The fourth proportional to 667.36, 995.16 and 621.19 is: 926.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.36 : 995.16 = 621.19 : x
  2. Step 2: Convert to fraction form
    667.36/995.16 = 621.19/x
  3. Step 3: Cross multiply
    667.36x = 995.16 × 621.19
  4. Step 4: Simplify right side
    667.36x = 618,183.44
  5. Step 5: Solve for x
    x = 618,183.44/667.36
  6. Step 6: Final answer
    x = 926.31

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.