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Finding the Fourth Proportional to 682.50, 1,023.51 and 220.16

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Solution

The fourth proportional to 682.50, 1,023.51 and 220.16 is: 330.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.50 : 1,023.51 = 220.16 : x
  2. Step 2: Convert to fraction form
    682.50/1,023.51 = 220.16/x
  3. Step 3: Cross multiply
    682.50x = 1,023.51 × 220.16
  4. Step 4: Simplify right side
    682.50x = 225,330.84
  5. Step 5: Solve for x
    x = 225,330.84/682.50
  6. Step 6: Final answer
    x = 330.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.