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Finding the Fourth Proportional to 321,759.96, 482,012.10 and 210,615

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Solution

The fourth proportional to 321,759.96, 482,012.10 and 210,615 is: 315,511.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,759.96 : 482,012.10 = 210,615 : x
  2. Step 2: Convert to fraction form
    321,759.96/482,012.10 = 210,615/x
  3. Step 3: Cross multiply
    321,759.96x = 482,012.10 × 210,615
  4. Step 4: Simplify right side
    321,759.96x = 101,518,978,441.50
  5. Step 5: Solve for x
    x = 101,518,978,441.50/321,759.96
  6. Step 6: Final answer
    x = 315,511.53

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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.