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Finding the Fourth Proportional to 180, 248.46 and 145.15

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Solution

The fourth proportional to 180, 248.46 and 145.15 is: 200.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    180 : 248.46 = 145.15 : x
  2. Step 2: Convert to fraction form
    180/248.46 = 145.15/x
  3. Step 3: Cross multiply
    180x = 248.46 × 145.15
  4. Step 4: Simplify right side
    180x = 36,063.97
  5. Step 5: Solve for x
    x = 36,063.97/180
  6. Step 6: Final answer
    x = 200.36

Related Problems

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1.5x scale

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.