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Finding the Fourth Proportional to 668.84, 923.10 and 406.82

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Solution

The fourth proportional to 668.84, 923.10 and 406.82 is: 561.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.84 : 923.10 = 406.82 : x
  2. Step 2: Convert to fraction form
    668.84/923.10 = 406.82/x
  3. Step 3: Cross multiply
    668.84x = 923.10 × 406.82
  4. Step 4: Simplify right side
    668.84x = 375,535.54
  5. Step 5: Solve for x
    x = 375,535.54/668.84
  6. Step 6: Final answer
    x = 561.47

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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.