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Finding the Fourth Proportional to 700.78, 966.13 and 451.68

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Solution

The fourth proportional to 700.78, 966.13 and 451.68 is: 622.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.78 : 966.13 = 451.68 : x
  2. Step 2: Convert to fraction form
    700.78/966.13 = 451.68/x
  3. Step 3: Cross multiply
    700.78x = 966.13 × 451.68
  4. Step 4: Simplify right side
    700.78x = 436,381.60
  5. Step 5: Solve for x
    x = 436,381.60/700.78
  6. Step 6: Final answer
    x = 622.71

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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.