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Finding the Fourth Proportional to 605.43, 835.02 and 395.40

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Solution

The fourth proportional to 605.43, 835.02 and 395.40 is: 545.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.43 : 835.02 = 395.40 : x
  2. Step 2: Convert to fraction form
    605.43/835.02 = 395.40/x
  3. Step 3: Cross multiply
    605.43x = 835.02 × 395.40
  4. Step 4: Simplify right side
    605.43x = 330,166.91
  5. Step 5: Solve for x
    x = 330,166.91/605.43
  6. Step 6: Final answer
    x = 545.34

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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.