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Finding the Fourth Proportional to 180.30, 248.50 and 149.02

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Solution

The fourth proportional to 180.30, 248.50 and 149.02 is: 205.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.30 : 248.50 = 149.02 : x
  2. Step 2: Convert to fraction form
    180.30/248.50 = 149.02/x
  3. Step 3: Cross multiply
    180.30x = 248.50 × 149.02
  4. Step 4: Simplify right side
    180.30x = 37,031.47
  5. Step 5: Solve for x
    x = 37,031.47/180.30
  6. Step 6: Final answer
    x = 205.39

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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.