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Finding the Fourth Proportional to 685.98, 940.49 and 673.70

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Solution

The fourth proportional to 685.98, 940.49 and 673.70 is: 923.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.98 : 940.49 = 673.70 : x
  2. Step 2: Convert to fraction form
    685.98/940.49 = 673.70/x
  3. Step 3: Cross multiply
    685.98x = 940.49 × 673.70
  4. Step 4: Simplify right side
    685.98x = 633,600.04
  5. Step 5: Solve for x
    x = 633,600.04/685.98
  6. Step 6: Final answer
    x = 923.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.