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Finding the Fourth Proportional to 321,315.91, 479,101.22 and 312,487.97

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Solution

The fourth proportional to 321,315.91, 479,101.22 and 312,487.97 is: 465,938.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,315.91 : 479,101.22 = 312,487.97 : x
  2. Step 2: Convert to fraction form
    321,315.91/479,101.22 = 312,487.97/x
  3. Step 3: Cross multiply
    321,315.91x = 479,101.22 × 312,487.97
  4. Step 4: Simplify right side
    321,315.91x = 149,713,366,692.28
  5. Step 5: Solve for x
    x = 149,713,366,692.28/321,315.91
  6. Step 6: Final answer
    x = 465,938.23

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.