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Finding the Fourth Proportional to 719.20, 993.09 and 453.79

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Solution

The fourth proportional to 719.20, 993.09 and 453.79 is: 626.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.20 : 993.09 = 453.79 : x
  2. Step 2: Convert to fraction form
    719.20/993.09 = 453.79/x
  3. Step 3: Cross multiply
    719.20x = 993.09 × 453.79
  4. Step 4: Simplify right side
    719.20x = 450,654.31
  5. Step 5: Solve for x
    x = 450,654.31/719.20
  6. Step 6: Final answer
    x = 626.60

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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.