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Finding the Fourth Proportional to 319.28, 440.58 and 186.46

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Solution

The fourth proportional to 319.28, 440.58 and 186.46 is: 257.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.28 : 440.58 = 186.46 : x
  2. Step 2: Convert to fraction form
    319.28/440.58 = 186.46/x
  3. Step 3: Cross multiply
    319.28x = 440.58 × 186.46
  4. Step 4: Simplify right side
    319.28x = 82,150.55
  5. Step 5: Solve for x
    x = 82,150.55/319.28
  6. Step 6: Final answer
    x = 257.30

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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.