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Finding the Fourth Proportional to 260.89, 360.18 and 172.40

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Solution

The fourth proportional to 260.89, 360.18 and 172.40 is: 238.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.89 : 360.18 = 172.40 : x
  2. Step 2: Convert to fraction form
    260.89/360.18 = 172.40/x
  3. Step 3: Cross multiply
    260.89x = 360.18 × 172.40
  4. Step 4: Simplify right side
    260.89x = 62,093.23
  5. Step 5: Solve for x
    x = 62,093.23/260.89
  6. Step 6: Final answer
    x = 238.01

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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.