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Finding the Fourth Proportional to 746.66, 1,029.83 and 451.55

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Solution

The fourth proportional to 746.66, 1,029.83 and 451.55 is: 622.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.66 : 1,029.83 = 451.55 : x
  2. Step 2: Convert to fraction form
    746.66/1,029.83 = 451.55/x
  3. Step 3: Cross multiply
    746.66x = 1,029.83 × 451.55
  4. Step 4: Simplify right side
    746.66x = 465,012.33
  5. Step 5: Solve for x
    x = 465,012.33/746.66
  6. Step 6: Final answer
    x = 622.79

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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.