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Finding the Fourth Proportional to 669.92, 1,004.52 and 322.92

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Solution

The fourth proportional to 669.92, 1,004.52 and 322.92 is: 484.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.92 : 1,004.52 = 322.92 : x
  2. Step 2: Convert to fraction form
    669.92/1,004.52 = 322.92/x
  3. Step 3: Cross multiply
    669.92x = 1,004.52 × 322.92
  4. Step 4: Simplify right side
    669.92x = 324,379.60
  5. Step 5: Solve for x
    x = 324,379.60/669.92
  6. Step 6: Final answer
    x = 484.21

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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.