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Finding the Fourth Proportional to 759.41, 1,138.63 and 451.18

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Solution

The fourth proportional to 759.41, 1,138.63 and 451.18 is: 676.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    759.41 : 1,138.63 = 451.18 : x
  2. Step 2: Convert to fraction form
    759.41/1,138.63 = 451.18/x
  3. Step 3: Cross multiply
    759.41x = 1,138.63 × 451.18
  4. Step 4: Simplify right side
    759.41x = 513,727.08
  5. Step 5: Solve for x
    x = 513,727.08/759.41
  6. Step 6: Final answer
    x = 676.48

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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.