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Finding the Fourth Proportional to 270.45, 405.06 and 192.99

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Solution

The fourth proportional to 270.45, 405.06 and 192.99 is: 289.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.45 : 405.06 = 192.99 : x
  2. Step 2: Convert to fraction form
    270.45/405.06 = 192.99/x
  3. Step 3: Cross multiply
    270.45x = 405.06 × 192.99
  4. Step 4: Simplify right side
    270.45x = 78,173.32
  5. Step 5: Solve for x
    x = 78,173.32/270.45
  6. Step 6: Final answer
    x = 289.05

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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.