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Finding the Fourth Proportional to 210.36, 289.51 and 163.55

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Solution

The fourth proportional to 210.36, 289.51 and 163.55 is: 225.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.36 : 289.51 = 163.55 : x
  2. Step 2: Convert to fraction form
    210.36/289.51 = 163.55/x
  3. Step 3: Cross multiply
    210.36x = 289.51 × 163.55
  4. Step 4: Simplify right side
    210.36x = 47,349.68
  5. Step 5: Solve for x
    x = 47,349.68/210.36
  6. Step 6: Final answer
    x = 225.08

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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.