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Finding the Fourth Proportional to 605.65, 835.58 and 448.61

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Solution

The fourth proportional to 605.65, 835.58 and 448.61 is: 618.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.65 : 835.58 = 448.61 : x
  2. Step 2: Convert to fraction form
    605.65/835.58 = 448.61/x
  3. Step 3: Cross multiply
    605.65x = 835.58 × 448.61
  4. Step 4: Simplify right side
    605.65x = 374,849.54
  5. Step 5: Solve for x
    x = 374,849.54/605.65
  6. Step 6: Final answer
    x = 618.92

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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.