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Finding the Fourth Proportional to 392.35, 541.13 and 274.28

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Solution

The fourth proportional to 392.35, 541.13 and 274.28 is: 378.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.35 : 541.13 = 274.28 : x
  2. Step 2: Convert to fraction form
    392.35/541.13 = 274.28/x
  3. Step 3: Cross multiply
    392.35x = 541.13 × 274.28
  4. Step 4: Simplify right side
    392.35x = 148,421.14
  5. Step 5: Solve for x
    x = 148,421.14/392.35
  6. Step 6: Final answer
    x = 378.29

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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.