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Finding the Fourth Proportional to 620.52, 851.36 and 605.04

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Solution

The fourth proportional to 620.52, 851.36 and 605.04 is: 830.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.52 : 851.36 = 605.04 : x
  2. Step 2: Convert to fraction form
    620.52/851.36 = 605.04/x
  3. Step 3: Cross multiply
    620.52x = 851.36 × 605.04
  4. Step 4: Simplify right side
    620.52x = 515,106.85
  5. Step 5: Solve for x
    x = 515,106.85/620.52
  6. Step 6: Final answer
    x = 830.12

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.