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Finding the Fourth Proportional to 540.36, 744.96 and 393

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Solution

The fourth proportional to 540.36, 744.96 and 393 is: 541.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.36 : 744.96 = 393 : x
  2. Step 2: Convert to fraction form
    540.36/744.96 = 393/x
  3. Step 3: Cross multiply
    540.36x = 744.96 × 393
  4. Step 4: Simplify right side
    540.36x = 292,769.28
  5. Step 5: Solve for x
    x = 292,769.28/540.36
  6. Step 6: Final answer
    x = 541.80

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