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Finding the Fourth Proportional to 673.90, 930 and 379.15

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Solution

The fourth proportional to 673.90, 930 and 379.15 is: 523.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.90 : 930 = 379.15 : x
  2. Step 2: Convert to fraction form
    673.90/930 = 379.15/x
  3. Step 3: Cross multiply
    673.90x = 930 × 379.15
  4. Step 4: Simplify right side
    673.90x = 352,609.50
  5. Step 5: Solve for x
    x = 352,609.50/673.90
  6. Step 6: Final answer
    x = 523.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.