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Finding the Fourth Proportional to 719.74, 992.94 and 454.09

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Solution

The fourth proportional to 719.74, 992.94 and 454.09 is: 626.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.74 : 992.94 = 454.09 : x
  2. Step 2: Convert to fraction form
    719.74/992.94 = 454.09/x
  3. Step 3: Cross multiply
    719.74x = 992.94 × 454.09
  4. Step 4: Simplify right side
    719.74x = 450,882.44
  5. Step 5: Solve for x
    x = 450,882.44/719.74
  6. Step 6: Final answer
    x = 626.46

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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.