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Finding the Fourth Proportional to 683.98, 1,026.11 and 221.64

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Solution

The fourth proportional to 683.98, 1,026.11 and 221.64 is: 332.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.98 : 1,026.11 = 221.64 : x
  2. Step 2: Convert to fraction form
    683.98/1,026.11 = 221.64/x
  3. Step 3: Cross multiply
    683.98x = 1,026.11 × 221.64
  4. Step 4: Simplify right side
    683.98x = 227,427.02
  5. Step 5: Solve for x
    x = 227,427.02/683.98
  6. Step 6: Final answer
    x = 332.51

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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.