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Finding the Fourth Proportional to 188.06, 259.40 and 172.58

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Solution

The fourth proportional to 188.06, 259.40 and 172.58 is: 238.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.06 : 259.40 = 172.58 : x
  2. Step 2: Convert to fraction form
    188.06/259.40 = 172.58/x
  3. Step 3: Cross multiply
    188.06x = 259.40 × 172.58
  4. Step 4: Simplify right side
    188.06x = 44,765.09
  5. Step 5: Solve for x
    x = 44,765.09/188.06
  6. Step 6: Final answer
    x = 238.04

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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.