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Finding the Fourth Proportional to 804.14, 1,204.17 and 642.14

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Solution

The fourth proportional to 804.14, 1,204.17 and 642.14 is: 961.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.14 : 1,204.17 = 642.14 : x
  2. Step 2: Convert to fraction form
    804.14/1,204.17 = 642.14/x
  3. Step 3: Cross multiply
    804.14x = 1,204.17 × 642.14
  4. Step 4: Simplify right side
    804.14x = 773,245.72
  5. Step 5: Solve for x
    x = 773,245.72/804.14
  6. Step 6: Final answer
    x = 961.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.