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Finding the Fourth Proportional to 393.30, 541.35 and 276.66

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Solution

The fourth proportional to 393.30, 541.35 and 276.66 is: 380.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.30 : 541.35 = 276.66 : x
  2. Step 2: Convert to fraction form
    393.30/541.35 = 276.66/x
  3. Step 3: Cross multiply
    393.30x = 541.35 × 276.66
  4. Step 4: Simplify right side
    393.30x = 149,769.89
  5. Step 5: Solve for x
    x = 149,769.89/393.30
  6. Step 6: Final answer
    x = 380.80

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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.