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Finding the Fourth Proportional to 321,515.88, 482,254.38 and 143,975.22

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Solution

The fourth proportional to 321,515.88, 482,254.38 and 143,975.22 is: 215,954.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,515.88 : 482,254.38 = 143,975.22 : x
  2. Step 2: Convert to fraction form
    321,515.88/482,254.38 = 143,975.22/x
  3. Step 3: Cross multiply
    321,515.88x = 482,254.38 × 143,975.22
  4. Step 4: Simplify right side
    321,515.88x = 69,432,680,456.46
  5. Step 5: Solve for x
    x = 69,432,680,456.46/321,515.88
  6. Step 6: Final answer
    x = 215,954.12

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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.