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Finding the Fourth Proportional to 746.21, 1,029.60 and 451.41

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Solution

The fourth proportional to 746.21, 1,029.60 and 451.41 is: 622.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.21 : 1,029.60 = 451.41 : x
  2. Step 2: Convert to fraction form
    746.21/1,029.60 = 451.41/x
  3. Step 3: Cross multiply
    746.21x = 1,029.60 × 451.41
  4. Step 4: Simplify right side
    746.21x = 464,771.74
  5. Step 5: Solve for x
    x = 464,771.74/746.21
  6. Step 6: Final answer
    x = 622.85

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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.