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Finding the Fourth Proportional to 669, 922.99 and 374.20

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Solution

The fourth proportional to 669, 922.99 and 374.20 is: 516.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    669 : 922.99 = 374.20 : x
  2. Step 2: Convert to fraction form
    669/922.99 = 374.20/x
  3. Step 3: Cross multiply
    669x = 922.99 × 374.20
  4. Step 4: Simplify right side
    669x = 345,382.86
  5. Step 5: Solve for x
    x = 345,382.86/669
  6. Step 6: Final answer
    x = 516.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.