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Finding the Fourth Proportional to 468,679.20, 646,789.13 and 287,491.04

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Solution

The fourth proportional to 468,679.20, 646,789.13 and 287,491.04 is: 396,744.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    468,679.20 : 646,789.13 = 287,491.04 : x
  2. Step 2: Convert to fraction form
    468,679.20/646,789.13 = 287,491.04/x
  3. Step 3: Cross multiply
    468,679.20x = 646,789.13 × 287,491.04
  4. Step 4: Simplify right side
    468,679.20x = 185,946,080,093.68
  5. Step 5: Solve for x
    x = 185,946,080,093.68/468,679.20
  6. Step 6: Final answer
    x = 396,744.90

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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.