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Finding the Fourth Proportional to 669.56, 922.74 and 521.96

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Solution

The fourth proportional to 669.56, 922.74 and 521.96 is: 719.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.56 : 922.74 = 521.96 : x
  2. Step 2: Convert to fraction form
    669.56/922.74 = 521.96/x
  3. Step 3: Cross multiply
    669.56x = 922.74 × 521.96
  4. Step 4: Simplify right side
    669.56x = 481,633.37
  5. Step 5: Solve for x
    x = 481,633.37/669.56
  6. Step 6: Final answer
    x = 719.33

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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.