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Finding the Fourth Proportional to 331.60, 496.76 and 259.12

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Solution

The fourth proportional to 331.60, 496.76 and 259.12 is: 388.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.60 : 496.76 = 259.12 : x
  2. Step 2: Convert to fraction form
    331.60/496.76 = 259.12/x
  3. Step 3: Cross multiply
    331.60x = 496.76 × 259.12
  4. Step 4: Simplify right side
    331.60x = 128,720.45
  5. Step 5: Solve for x
    x = 128,720.45/331.60
  6. Step 6: Final answer
    x = 388.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.