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Finding the Fourth Proportional to 180.99, 270.95 and 99.72

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Solution

The fourth proportional to 180.99, 270.95 and 99.72 is: 149.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.99 : 270.95 = 99.72 : x
  2. Step 2: Convert to fraction form
    180.99/270.95 = 99.72/x
  3. Step 3: Cross multiply
    180.99x = 270.95 × 99.72
  4. Step 4: Simplify right side
    180.99x = 27,018.64
  5. Step 5: Solve for x
    x = 27,018.64/180.99
  6. Step 6: Final answer
    x = 149.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.