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Finding the Fourth Proportional to 662.13, 991.31 and 525.38

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Solution

The fourth proportional to 662.13, 991.31 and 525.38 is: 786.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.13 : 991.31 = 525.38 : x
  2. Step 2: Convert to fraction form
    662.13/991.31 = 525.38/x
  3. Step 3: Cross multiply
    662.13x = 991.31 × 525.38
  4. Step 4: Simplify right side
    662.13x = 520,806.86
  5. Step 5: Solve for x
    x = 520,806.86/662.13
  6. Step 6: Final answer
    x = 786.56

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.