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Finding the Fourth Proportional to 605.29, 835.70 and 465.15

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Solution

The fourth proportional to 605.29, 835.70 and 465.15 is: 642.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.29 : 835.70 = 465.15 : x
  2. Step 2: Convert to fraction form
    605.29/835.70 = 465.15/x
  3. Step 3: Cross multiply
    605.29x = 835.70 × 465.15
  4. Step 4: Simplify right side
    605.29x = 388,724.11
  5. Step 5: Solve for x
    x = 388,724.11/605.29
  6. Step 6: Final answer
    x = 642.21

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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.