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Finding the Fourth Proportional to 668.09, 923.00 and 621.99

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Solution

The fourth proportional to 668.09, 923.00 and 621.99 is: 859.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.09 : 923.00 = 621.99 : x
  2. Step 2: Convert to fraction form
    668.09/923.00 = 621.99/x
  3. Step 3: Cross multiply
    668.09x = 923.00 × 621.99
  4. Step 4: Simplify right side
    668.09x = 574,093.66
  5. Step 5: Solve for x
    x = 574,093.66/668.09
  6. Step 6: Final answer
    x = 859.30

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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.