Home / 864,000.20-1,296,000.30-486,086.60

Finding the Fourth Proportional to 864,000.20, 1,296,000.30 and 486,086.60

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Solution

The fourth proportional to 864,000.20, 1,296,000.30 and 486,086.60 is: 729,129.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    864,000.20 : 1,296,000.30 = 486,086.60 : x
  2. Step 2: Convert to fraction form
    864,000.20/1,296,000.30 = 486,086.60/x
  3. Step 3: Cross multiply
    864,000.20x = 1,296,000.30 × 486,086.60
  4. Step 4: Simplify right side
    864,000.20x = 629,968,379,425.98
  5. Step 5: Solve for x
    x = 629,968,379,425.98/864,000.20
  6. Step 6: Final answer
    x = 729,129.90

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1.5x scale

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.