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Finding the Fourth Proportional to 419,659.38, 579,130.02 and 228,672.72

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Solution

The fourth proportional to 419,659.38, 579,130.02 and 228,672.72 is: 315,568.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,659.38 : 579,130.02 = 228,672.72 : x
  2. Step 2: Convert to fraction form
    419,659.38/579,130.02 = 228,672.72/x
  3. Step 3: Cross multiply
    419,659.38x = 579,130.02 × 228,672.72
  4. Step 4: Simplify right side
    419,659.38x = 132,431,236,907.05
  5. Step 5: Solve for x
    x = 132,431,236,907.05/419,659.38
  6. Step 6: Final answer
    x = 315,568.39

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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.