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Finding the Fourth Proportional to 673.76, 929.82 and 449.30

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Solution

The fourth proportional to 673.76, 929.82 and 449.30 is: 620.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.76 : 929.82 = 449.30 : x
  2. Step 2: Convert to fraction form
    673.76/929.82 = 449.30/x
  3. Step 3: Cross multiply
    673.76x = 929.82 × 449.30
  4. Step 4: Simplify right side
    673.76x = 417,770.45
  5. Step 5: Solve for x
    x = 417,770.45/673.76
  6. Step 6: Final answer
    x = 620.06

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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.