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Finding the Fourth Proportional to 669.44, 1,004.20 and 322.70

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Solution

The fourth proportional to 669.44, 1,004.20 and 322.70 is: 484.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.44 : 1,004.20 = 322.70 : x
  2. Step 2: Convert to fraction form
    669.44/1,004.20 = 322.70/x
  3. Step 3: Cross multiply
    669.44x = 1,004.20 × 322.70
  4. Step 4: Simplify right side
    669.44x = 324,055.34
  5. Step 5: Solve for x
    x = 324,055.34/669.44
  6. Step 6: Final answer
    x = 484.07

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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.