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Finding the Fourth Proportional to 804.75, 1,207.94 and 561.75

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Solution

The fourth proportional to 804.75, 1,207.94 and 561.75 is: 843.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.75 : 1,207.94 = 561.75 : x
  2. Step 2: Convert to fraction form
    804.75/1,207.94 = 561.75/x
  3. Step 3: Cross multiply
    804.75x = 1,207.94 × 561.75
  4. Step 4: Simplify right side
    804.75x = 678,557.49
  5. Step 5: Solve for x
    x = 678,557.49/804.75
  6. Step 6: Final answer
    x = 843.19

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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.