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Finding the Fourth Proportional to 669.11, 923.63 and 447.98

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Solution

The fourth proportional to 669.11, 923.63 and 447.98 is: 618.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.11 : 923.63 = 447.98 : x
  2. Step 2: Convert to fraction form
    669.11/923.63 = 447.98/x
  3. Step 3: Cross multiply
    669.11x = 923.63 × 447.98
  4. Step 4: Simplify right side
    669.11x = 413,760.91
  5. Step 5: Solve for x
    x = 413,760.91/669.11
  6. Step 6: Final answer
    x = 618.38

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1.5x scale

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.