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Finding the Fourth Proportional to 321,699.80, 482,856.90 and 275,005.40

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Solution

The fourth proportional to 321,699.80, 482,856.90 and 275,005.40 is: 412,770.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,699.80 : 482,856.90 = 275,005.40 : x
  2. Step 2: Convert to fraction form
    321,699.80/482,856.90 = 275,005.40/x
  3. Step 3: Cross multiply
    321,699.80x = 482,856.90 × 275,005.40
  4. Step 4: Simplify right side
    321,699.80x = 132,788,254,927.26
  5. Step 5: Solve for x
    x = 132,788,254,927.26/321,699.80
  6. Step 6: Final answer
    x = 412,770.71

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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.