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Finding the Fourth Proportional to 673.21, 928.97 and 378.42

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Solution

The fourth proportional to 673.21, 928.97 and 378.42 is: 522.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.21 : 928.97 = 378.42 : x
  2. Step 2: Convert to fraction form
    673.21/928.97 = 378.42/x
  3. Step 3: Cross multiply
    673.21x = 928.97 × 378.42
  4. Step 4: Simplify right side
    673.21x = 351,542.10
  5. Step 5: Solve for x
    x = 351,542.10/673.21
  6. Step 6: Final answer
    x = 522.19

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1.5x scale

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.