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Finding the Fourth Proportional to 671,073.49, 925,728.50 and 398,947.84

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Solution

The fourth proportional to 671,073.49, 925,728.50 and 398,947.84 is: 550,338.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,073.49 : 925,728.50 = 398,947.84 : x
  2. Step 2: Convert to fraction form
    671,073.49/925,728.50 = 398,947.84/x
  3. Step 3: Cross multiply
    671,073.49x = 925,728.50 × 398,947.84
  4. Step 4: Simplify right side
    671,073.49x = 369,317,380,872.80
  5. Step 5: Solve for x
    x = 369,317,380,872.80/671,073.49
  6. Step 6: Final answer
    x = 550,338.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.