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Finding the Fourth Proportional to 744.22, 1,117.32 and 451.96

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Solution

The fourth proportional to 744.22, 1,117.32 and 451.96 is: 678.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.22 : 1,117.32 = 451.96 : x
  2. Step 2: Convert to fraction form
    744.22/1,117.32 = 451.96/x
  3. Step 3: Cross multiply
    744.22x = 1,117.32 × 451.96
  4. Step 4: Simplify right side
    744.22x = 504,983.95
  5. Step 5: Solve for x
    x = 504,983.95/744.22
  6. Step 6: Final answer
    x = 678.54

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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.