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Finding the Fourth Proportional to 260.15, 358.94 and 172.67

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Solution

The fourth proportional to 260.15, 358.94 and 172.67 is: 238.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.15 : 358.94 = 172.67 : x
  2. Step 2: Convert to fraction form
    260.15/358.94 = 172.67/x
  3. Step 3: Cross multiply
    260.15x = 358.94 × 172.67
  4. Step 4: Simplify right side
    260.15x = 61,977.31
  5. Step 5: Solve for x
    x = 61,977.31/260.15
  6. Step 6: Final answer
    x = 238.24

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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.