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Finding the Fourth Proportional to 699.78, 966.22 and 451.25

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Solution

The fourth proportional to 699.78, 966.22 and 451.25 is: 623.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.78 : 966.22 = 451.25 : x
  2. Step 2: Convert to fraction form
    699.78/966.22 = 451.25/x
  3. Step 3: Cross multiply
    699.78x = 966.22 × 451.25
  4. Step 4: Simplify right side
    699.78x = 436,004.44
  5. Step 5: Solve for x
    x = 436,004.44/699.78
  6. Step 6: Final answer
    x = 623.06

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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.