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Finding the Fourth Proportional to 319.56, 440.97 and 188.57

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Solution

The fourth proportional to 319.56, 440.97 and 188.57 is: 260.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.56 : 440.97 = 188.57 : x
  2. Step 2: Convert to fraction form
    319.56/440.97 = 188.57/x
  3. Step 3: Cross multiply
    319.56x = 440.97 × 188.57
  4. Step 4: Simplify right side
    319.56x = 83,151.51
  5. Step 5: Solve for x
    x = 83,151.51/319.56
  6. Step 6: Final answer
    x = 260.21

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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.