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Finding the Fourth Proportional to 773.70, 1,067.74 and 479.13

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Solution

The fourth proportional to 773.70, 1,067.74 and 479.13 is: 661.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.70 : 1,067.74 = 479.13 : x
  2. Step 2: Convert to fraction form
    773.70/1,067.74 = 479.13/x
  3. Step 3: Cross multiply
    773.70x = 1,067.74 × 479.13
  4. Step 4: Simplify right side
    773.70x = 511,581.06
  5. Step 5: Solve for x
    x = 511,581.06/773.70
  6. Step 6: Final answer
    x = 661.22

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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.