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Finding the Fourth Proportional to 236.71, 356.45 and 172.16

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Solution

The fourth proportional to 236.71, 356.45 and 172.16 is: 259.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.71 : 356.45 = 172.16 : x
  2. Step 2: Convert to fraction form
    236.71/356.45 = 172.16/x
  3. Step 3: Cross multiply
    236.71x = 356.45 × 172.16
  4. Step 4: Simplify right side
    236.71x = 61,366.09
  5. Step 5: Solve for x
    x = 61,366.09/236.71
  6. Step 6: Final answer
    x = 259.25

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.