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Finding the Fourth Proportional to 321,706.80, 482,867.40 and 275,012.40

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Solution

The fourth proportional to 321,706.80, 482,867.40 and 275,012.40 is: 412,781.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,706.80 : 482,867.40 = 275,012.40 : x
  2. Step 2: Convert to fraction form
    321,706.80/482,867.40 = 275,012.40/x
  3. Step 3: Cross multiply
    321,706.80x = 482,867.40 × 275,012.40
  4. Step 4: Simplify right side
    321,706.80x = 132,794,522,555.76
  5. Step 5: Solve for x
    x = 132,794,522,555.76/321,706.80
  6. Step 6: Final answer
    x = 412,781.21

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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.