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Finding the Fourth Proportional to 679.29, 931.79 and 673.45

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Solution

The fourth proportional to 679.29, 931.79 and 673.45 is: 923.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.29 : 931.79 = 673.45 : x
  2. Step 2: Convert to fraction form
    679.29/931.79 = 673.45/x
  3. Step 3: Cross multiply
    679.29x = 931.79 × 673.45
  4. Step 4: Simplify right side
    679.29x = 627,509.54
  5. Step 5: Solve for x
    x = 627,509.54/679.29
  6. Step 6: Final answer
    x = 923.78

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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.