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Finding the Fourth Proportional to 669.27, 923.61 and 407.23

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Solution

The fourth proportional to 669.27, 923.61 and 407.23 is: 561.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.27 : 923.61 = 407.23 : x
  2. Step 2: Convert to fraction form
    669.27/923.61 = 407.23/x
  3. Step 3: Cross multiply
    669.27x = 923.61 × 407.23
  4. Step 4: Simplify right side
    669.27x = 376,121.70
  5. Step 5: Solve for x
    x = 376,121.70/669.27
  6. Step 6: Final answer
    x = 561.99

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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.