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Finding the Fourth Proportional to 270.99, 374.04 and 172.71

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Solution

The fourth proportional to 270.99, 374.04 and 172.71 is: 238.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.99 : 374.04 = 172.71 : x
  2. Step 2: Convert to fraction form
    270.99/374.04 = 172.71/x
  3. Step 3: Cross multiply
    270.99x = 374.04 × 172.71
  4. Step 4: Simplify right side
    270.99x = 64,600.45
  5. Step 5: Solve for x
    x = 64,600.45/270.99
  6. Step 6: Final answer
    x = 238.39

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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.