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Finding the Fourth Proportional to 685.62, 939.98 and 673.34

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Solution

The fourth proportional to 685.62, 939.98 and 673.34 is: 923.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.62 : 939.98 = 673.34 : x
  2. Step 2: Convert to fraction form
    685.62/939.98 = 673.34/x
  3. Step 3: Cross multiply
    685.62x = 939.98 × 673.34
  4. Step 4: Simplify right side
    685.62x = 632,923.12
  5. Step 5: Solve for x
    x = 632,923.12/685.62
  6. Step 6: Final answer
    x = 923.14

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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.