Home / 658,018.20-985,277.70-420,072.60

Finding the Fourth Proportional to 658,018.20, 985,277.70 and 420,072.60

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Solution

The fourth proportional to 658,018.20, 985,277.70 and 420,072.60 is: 628,991.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,018.20 : 985,277.70 = 420,072.60 : x
  2. Step 2: Convert to fraction form
    658,018.20/985,277.70 = 420,072.60/x
  3. Step 3: Cross multiply
    658,018.20x = 985,277.70 × 420,072.60
  4. Step 4: Simplify right side
    658,018.20x = 413,888,165,161.02
  5. Step 5: Solve for x
    x = 413,888,165,161.02/658,018.20
  6. Step 6: Final answer
    x = 628,991.97

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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.