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Finding the Fourth Proportional to 620.33, 855.79 and 410.60

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Solution

The fourth proportional to 620.33, 855.79 and 410.60 is: 566.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.33 : 855.79 = 410.60 : x
  2. Step 2: Convert to fraction form
    620.33/855.79 = 410.60/x
  3. Step 3: Cross multiply
    620.33x = 855.79 × 410.60
  4. Step 4: Simplify right side
    620.33x = 351,388.49
  5. Step 5: Solve for x
    x = 351,388.49/620.33
  6. Step 6: Final answer
    x = 566.46

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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.