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Finding the Fourth Proportional to 236.16, 355.73 and 210.78

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Solution

The fourth proportional to 236.16, 355.73 and 210.78 is: 317.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.16 : 355.73 = 210.78 : x
  2. Step 2: Convert to fraction form
    236.16/355.73 = 210.78/x
  3. Step 3: Cross multiply
    236.16x = 355.73 × 210.78
  4. Step 4: Simplify right side
    236.16x = 74,979.72
  5. Step 5: Solve for x
    x = 74,979.72/236.16
  6. Step 6: Final answer
    x = 317.50

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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.