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Finding the Fourth Proportional to 746.20, 1,029.84 and 451.55

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Solution

The fourth proportional to 746.20, 1,029.84 and 451.55 is: 623.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.20 : 1,029.84 = 451.55 : x
  2. Step 2: Convert to fraction form
    746.20/1,029.84 = 451.55/x
  3. Step 3: Cross multiply
    746.20x = 1,029.84 × 451.55
  4. Step 4: Simplify right side
    746.20x = 465,024.25
  5. Step 5: Solve for x
    x = 465,024.25/746.20
  6. Step 6: Final answer
    x = 623.19

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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.