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Finding the Fourth Proportional to 218.06, 325.16 and 210.18

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Solution

The fourth proportional to 218.06, 325.16 and 210.18 is: 313.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.06 : 325.16 = 210.18 : x
  2. Step 2: Convert to fraction form
    218.06/325.16 = 210.18/x
  3. Step 3: Cross multiply
    218.06x = 325.16 × 210.18
  4. Step 4: Simplify right side
    218.06x = 68,342.13
  5. Step 5: Solve for x
    x = 68,342.13/218.06
  6. Step 6: Final answer
    x = 313.41

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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.