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Finding the Fourth Proportional to 605.12, 904.57 and 449.60

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Solution

The fourth proportional to 605.12, 904.57 and 449.60 is: 672.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.12 : 904.57 = 449.60 : x
  2. Step 2: Convert to fraction form
    605.12/904.57 = 449.60/x
  3. Step 3: Cross multiply
    605.12x = 904.57 × 449.60
  4. Step 4: Simplify right side
    605.12x = 406,694.67
  5. Step 5: Solve for x
    x = 406,694.67/605.12
  6. Step 6: Final answer
    x = 672.09

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.