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Finding the Fourth Proportional to 250.31, 345.20 and 188.27

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Solution

The fourth proportional to 250.31, 345.20 and 188.27 is: 259.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.31 : 345.20 = 188.27 : x
  2. Step 2: Convert to fraction form
    250.31/345.20 = 188.27/x
  3. Step 3: Cross multiply
    250.31x = 345.20 × 188.27
  4. Step 4: Simplify right side
    250.31x = 64,988.14
  5. Step 5: Solve for x
    x = 64,988.14/250.31
  6. Step 6: Final answer
    x = 259.64

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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.