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Finding the Fourth Proportional to 319.33, 440.64 and 188.32

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Solution

The fourth proportional to 319.33, 440.64 and 188.32 is: 259.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.33 : 440.64 = 188.32 : x
  2. Step 2: Convert to fraction form
    319.33/440.64 = 188.32/x
  3. Step 3: Cross multiply
    319.33x = 440.64 × 188.32
  4. Step 4: Simplify right side
    319.33x = 82,978.18
  5. Step 5: Solve for x
    x = 82,978.18/319.33
  6. Step 6: Final answer
    x = 259.85

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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.