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Finding the Fourth Proportional to 668.92, 923.34 and 619.96

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Solution

The fourth proportional to 668.92, 923.34 and 619.96 is: 855.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.92 : 923.34 = 619.96 : x
  2. Step 2: Convert to fraction form
    668.92/923.34 = 619.96/x
  3. Step 3: Cross multiply
    668.92x = 923.34 × 619.96
  4. Step 4: Simplify right side
    668.92x = 572,433.87
  5. Step 5: Solve for x
    x = 572,433.87/668.92
  6. Step 6: Final answer
    x = 855.76

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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.