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Finding the Fourth Proportional to 662.04, 913.61 and 396.53

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Solution

The fourth proportional to 662.04, 913.61 and 396.53 is: 547.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.04 : 913.61 = 396.53 : x
  2. Step 2: Convert to fraction form
    662.04/913.61 = 396.53/x
  3. Step 3: Cross multiply
    662.04x = 913.61 × 396.53
  4. Step 4: Simplify right side
    662.04x = 362,273.62
  5. Step 5: Solve for x
    x = 362,273.62/662.04
  6. Step 6: Final answer
    x = 547.21

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.