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Finding the Fourth Proportional to 669.13, 923.37 and 389.17

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Solution

The fourth proportional to 669.13, 923.37 and 389.17 is: 537.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.13 : 923.37 = 389.17 : x
  2. Step 2: Convert to fraction form
    669.13/923.37 = 389.17/x
  3. Step 3: Cross multiply
    669.13x = 923.37 × 389.17
  4. Step 4: Simplify right side
    669.13x = 359,347.90
  5. Step 5: Solve for x
    x = 359,347.90/669.13
  6. Step 6: Final answer
    x = 537.04

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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.