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Finding the Fourth Proportional to 1,194.22, 1,648.01 and 728.47

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Solution

The fourth proportional to 1,194.22, 1,648.01 and 728.47 is: 1,005.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,194.22 : 1,648.01 = 728.47 : x
  2. Step 2: Convert to fraction form
    1,194.22/1,648.01 = 728.47/x
  3. Step 3: Cross multiply
    1,194.22x = 1,648.01 × 728.47
  4. Step 4: Simplify right side
    1,194.22x = 1,200,525.84
  5. Step 5: Solve for x
    x = 1,200,525.84/1,194.22
  6. Step 6: Final answer
    x = 1,005.28

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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.