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Finding the Fourth Proportional to 605.51, 835.60 and 395.45

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Solution

The fourth proportional to 605.51, 835.60 and 395.45 is: 545.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.51 : 835.60 = 395.45 : x
  2. Step 2: Convert to fraction form
    605.51/835.60 = 395.45/x
  3. Step 3: Cross multiply
    605.51x = 835.60 × 395.45
  4. Step 4: Simplify right side
    605.51x = 330,433.84
  5. Step 5: Solve for x
    x = 330,433.84/605.51
  6. Step 6: Final answer
    x = 545.72

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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.