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Finding the Fourth Proportional to 673.63, 929.65 and 449.18

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Solution

The fourth proportional to 673.63, 929.65 and 449.18 is: 619.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.63 : 929.65 = 449.18 : x
  2. Step 2: Convert to fraction form
    673.63/929.65 = 449.18/x
  3. Step 3: Cross multiply
    673.63x = 929.65 × 449.18
  4. Step 4: Simplify right side
    673.63x = 417,580.19
  5. Step 5: Solve for x
    x = 417,580.19/673.63
  6. Step 6: Final answer
    x = 619.90

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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.