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Finding the Fourth Proportional to 448.64, 673.41 and 439.53

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Solution

The fourth proportional to 448.64, 673.41 and 439.53 is: 659.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.64 : 673.41 = 439.53 : x
  2. Step 2: Convert to fraction form
    448.64/673.41 = 439.53/x
  3. Step 3: Cross multiply
    448.64x = 673.41 × 439.53
  4. Step 4: Simplify right side
    448.64x = 295,983.02
  5. Step 5: Solve for x
    x = 295,983.02/448.64
  6. Step 6: Final answer
    x = 659.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.