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Finding the Fourth Proportional to 670.22, 1,004.96 and 231.34

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Solution

The fourth proportional to 670.22, 1,004.96 and 231.34 is: 346.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.22 : 1,004.96 = 231.34 : x
  2. Step 2: Convert to fraction form
    670.22/1,004.96 = 231.34/x
  3. Step 3: Cross multiply
    670.22x = 1,004.96 × 231.34
  4. Step 4: Simplify right side
    670.22x = 232,487.45
  5. Step 5: Solve for x
    x = 232,487.45/670.22
  6. Step 6: Final answer
    x = 346.88

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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.