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Finding the Fourth Proportional to 804.89, 1,207.30 and 512.68

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Solution

The fourth proportional to 804.89, 1,207.30 and 512.68 is: 769.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.89 : 1,207.30 = 512.68 : x
  2. Step 2: Convert to fraction form
    804.89/1,207.30 = 512.68/x
  3. Step 3: Cross multiply
    804.89x = 1,207.30 × 512.68
  4. Step 4: Simplify right side
    804.89x = 618,958.56
  5. Step 5: Solve for x
    x = 618,958.56/804.89
  6. Step 6: Final answer
    x = 769.00

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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.