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Finding the Fourth Proportional to 392.03, 540.88 and 236.78

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Solution

The fourth proportional to 392.03, 540.88 and 236.78 is: 326.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.03 : 540.88 = 236.78 : x
  2. Step 2: Convert to fraction form
    392.03/540.88 = 236.78/x
  3. Step 3: Cross multiply
    392.03x = 540.88 × 236.78
  4. Step 4: Simplify right side
    392.03x = 128,068.30
  5. Step 5: Solve for x
    x = 128,068.30/392.03
  6. Step 6: Final answer
    x = 326.68

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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.