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Finding the Fourth Proportional to 673.29, 928.89 and 393.41

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Solution

The fourth proportional to 673.29, 928.89 and 393.41 is: 542.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.29 : 928.89 = 393.41 : x
  2. Step 2: Convert to fraction form
    673.29/928.89 = 393.41/x
  3. Step 3: Cross multiply
    673.29x = 928.89 × 393.41
  4. Step 4: Simplify right side
    673.29x = 365,436.94
  5. Step 5: Solve for x
    x = 365,436.94/673.29
  6. Step 6: Final answer
    x = 542.76

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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.