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Finding the Fourth Proportional to 240.42, 360.09 and 172.02

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Solution

The fourth proportional to 240.42, 360.09 and 172.02 is: 257.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.42 : 360.09 = 172.02 : x
  2. Step 2: Convert to fraction form
    240.42/360.09 = 172.02/x
  3. Step 3: Cross multiply
    240.42x = 360.09 × 172.02
  4. Step 4: Simplify right side
    240.42x = 61,942.68
  5. Step 5: Solve for x
    x = 61,942.68/240.42
  6. Step 6: Final answer
    x = 257.64

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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.