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Finding the Fourth Proportional to 449,535.15, 674,302.73 and 428,799.15

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Solution

The fourth proportional to 449,535.15, 674,302.73 and 428,799.15 is: 643,198.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,535.15 : 674,302.73 = 428,799.15 : x
  2. Step 2: Convert to fraction form
    449,535.15/674,302.73 = 428,799.15/x
  3. Step 3: Cross multiply
    449,535.15x = 674,302.73 × 428,799.15
  4. Step 4: Simplify right side
    449,535.15x = 289,140,435,322.68
  5. Step 5: Solve for x
    x = 289,140,435,322.68/449,535.15
  6. Step 6: Final answer
    x = 643,198.73

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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.