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Finding the Fourth Proportional to 392.01, 540.99 and 272.40

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Solution

The fourth proportional to 392.01, 540.99 and 272.40 is: 375.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.01 : 540.99 = 272.40 : x
  2. Step 2: Convert to fraction form
    392.01/540.99 = 272.40/x
  3. Step 3: Cross multiply
    392.01x = 540.99 × 272.40
  4. Step 4: Simplify right side
    392.01x = 147,365.68
  5. Step 5: Solve for x
    x = 147,365.68/392.01
  6. Step 6: Final answer
    x = 375.92

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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.