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Finding the Fourth Proportional to 620.01, 861.55 and 613.26

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Solution

The fourth proportional to 620.01, 861.55 and 613.26 is: 852.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.01 : 861.55 = 613.26 : x
  2. Step 2: Convert to fraction form
    620.01/861.55 = 613.26/x
  3. Step 3: Cross multiply
    620.01x = 861.55 × 613.26
  4. Step 4: Simplify right side
    620.01x = 528,352.62
  5. Step 5: Solve for x
    x = 528,352.62/620.01
  6. Step 6: Final answer
    x = 852.17

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.