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Finding the Fourth Proportional to 219.48, 331.08 and 210.84

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Solution

The fourth proportional to 219.48, 331.08 and 210.84 is: 318.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.48 : 331.08 = 210.84 : x
  2. Step 2: Convert to fraction form
    219.48/331.08 = 210.84/x
  3. Step 3: Cross multiply
    219.48x = 331.08 × 210.84
  4. Step 4: Simplify right side
    219.48x = 69,804.91
  5. Step 5: Solve for x
    x = 69,804.91/219.48
  6. Step 6: Final answer
    x = 318.05

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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.