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Finding the Fourth Proportional to 673.25, 929 and 393.43

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Solution

The fourth proportional to 673.25, 929 and 393.43 is: 542.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.25 : 929 = 393.43 : x
  2. Step 2: Convert to fraction form
    673.25/929 = 393.43/x
  3. Step 3: Cross multiply
    673.25x = 929 × 393.43
  4. Step 4: Simplify right side
    673.25x = 365,496.47
  5. Step 5: Solve for x
    x = 365,496.47/673.25
  6. Step 6: Final answer
    x = 542.88

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Double scale
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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.