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Finding the Fourth Proportional to 673.14, 928.67 and 378.34

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Solution

The fourth proportional to 673.14, 928.67 and 378.34 is: 521.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.14 : 928.67 = 378.34 : x
  2. Step 2: Convert to fraction form
    673.14/928.67 = 378.34/x
  3. Step 3: Cross multiply
    673.14x = 928.67 × 378.34
  4. Step 4: Simplify right side
    673.14x = 351,353.01
  5. Step 5: Solve for x
    x = 351,353.01/673.14
  6. Step 6: Final answer
    x = 521.96

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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.