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Finding the Fourth Proportional to 1,194.42, 1,647.99 and 722.60

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Solution

The fourth proportional to 1,194.42, 1,647.99 and 722.60 is: 996.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,194.42 : 1,647.99 = 722.60 : x
  2. Step 2: Convert to fraction form
    1,194.42/1,647.99 = 722.60/x
  3. Step 3: Cross multiply
    1,194.42x = 1,647.99 × 722.60
  4. Step 4: Simplify right side
    1,194.42x = 1,190,829.33
  5. Step 5: Solve for x
    x = 1,190,829.33/1,194.42
  6. Step 6: Final answer
    x = 996.99

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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.