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Finding the Fourth Proportional to 218.31, 325.29 and 210.48

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Solution

The fourth proportional to 218.31, 325.29 and 210.48 is: 313.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.31 : 325.29 = 210.48 : x
  2. Step 2: Convert to fraction form
    218.31/325.29 = 210.48/x
  3. Step 3: Cross multiply
    218.31x = 325.29 × 210.48
  4. Step 4: Simplify right side
    218.31x = 68,467.04
  5. Step 5: Solve for x
    x = 68,467.04/218.31
  6. Step 6: Final answer
    x = 313.62

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.