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Finding the Fourth Proportional to 448,903.45, 672,491.31 and 280,489.87

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Solution

The fourth proportional to 448,903.45, 672,491.31 and 280,489.87 is: 420,195.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,903.45 : 672,491.31 = 280,489.87 : x
  2. Step 2: Convert to fraction form
    448,903.45/672,491.31 = 280,489.87/x
  3. Step 3: Cross multiply
    448,903.45x = 672,491.31 × 280,489.87
  4. Step 4: Simplify right side
    448,903.45x = 188,627,000,118.03
  5. Step 5: Solve for x
    x = 188,627,000,118.03/448,903.45
  6. Step 6: Final answer
    x = 420,195.03

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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.