Home / 919,968.80-1,379,953.20-415,099.85

Finding the Fourth Proportional to 919,968.80, 1,379,953.20 and 415,099.85

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Solution

The fourth proportional to 919,968.80, 1,379,953.20 and 415,099.85 is: 622,649.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,968.80 : 1,379,953.20 = 415,099.85 : x
  2. Step 2: Convert to fraction form
    919,968.80/1,379,953.20 = 415,099.85/x
  3. Step 3: Cross multiply
    919,968.80x = 1,379,953.20 × 415,099.85
  4. Step 4: Simplify right side
    919,968.80x = 572,818,366,327.02
  5. Step 5: Solve for x
    x = 572,818,366,327.02/919,968.80
  6. Step 6: Final answer
    x = 622,649.78

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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.