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Finding the Fourth Proportional to 670.89, 1,006.34 and 441.22

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Solution

The fourth proportional to 670.89, 1,006.34 and 441.22 is: 661.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.89 : 1,006.34 = 441.22 : x
  2. Step 2: Convert to fraction form
    670.89/1,006.34 = 441.22/x
  3. Step 3: Cross multiply
    670.89x = 1,006.34 × 441.22
  4. Step 4: Simplify right side
    670.89x = 444,015.13
  5. Step 5: Solve for x
    x = 444,015.13/670.89
  6. Step 6: Final answer
    x = 661.83

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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.