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Finding the Fourth Proportional to 321,702.80, 482,861.40 and 275,008.40

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Solution

The fourth proportional to 321,702.80, 482,861.40 and 275,008.40 is: 412,775.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,702.80 : 482,861.40 = 275,008.40 : x
  2. Step 2: Convert to fraction form
    321,702.80/482,861.40 = 275,008.40/x
  3. Step 3: Cross multiply
    321,702.80x = 482,861.40 × 275,008.40
  4. Step 4: Simplify right side
    321,702.80x = 132,790,941,035.76
  5. Step 5: Solve for x
    x = 132,790,941,035.76/321,702.80
  6. Step 6: Final answer
    x = 412,775.21

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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.