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Finding the Fourth Proportional to 851.82, 1,173.82 and 615.36

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Solution

The fourth proportional to 851.82, 1,173.82 and 615.36 is: 847.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.82 : 1,173.82 = 615.36 : x
  2. Step 2: Convert to fraction form
    851.82/1,173.82 = 615.36/x
  3. Step 3: Cross multiply
    851.82x = 1,173.82 × 615.36
  4. Step 4: Simplify right side
    851.82x = 722,321.88
  5. Step 5: Solve for x
    x = 722,321.88/851.82
  6. Step 6: Final answer
    x = 847.97

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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.