Home / 658,026.20-985,289.70-420,080.60

Finding the Fourth Proportional to 658,026.20, 985,289.70 and 420,080.60

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Solution

The fourth proportional to 658,026.20, 985,289.70 and 420,080.60 is: 629,003.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,026.20 : 985,289.70 = 420,080.60 : x
  2. Step 2: Convert to fraction form
    658,026.20/985,289.70 = 420,080.60/x
  3. Step 3: Cross multiply
    658,026.20x = 985,289.70 × 420,080.60
  4. Step 4: Simplify right side
    658,026.20x = 413,901,088,349.82
  5. Step 5: Solve for x
    x = 413,901,088,349.82/658,026.20
  6. Step 6: Final answer
    x = 629,003.96

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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.