Home / 919,129.80-1,379,817.90-520,048.20

Finding the Fourth Proportional to 919,129.80, 1,379,817.90 and 520,048.20

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Solution

The fourth proportional to 919,129.80, 1,379,817.90 and 520,048.20 is: 780,707.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,129.80 : 1,379,817.90 = 520,048.20 : x
  2. Step 2: Convert to fraction form
    919,129.80/1,379,817.90 = 520,048.20/x
  3. Step 3: Cross multiply
    919,129.80x = 1,379,817.90 × 520,048.20
  4. Step 4: Simplify right side
    919,129.80x = 717,571,815,222.78
  5. Step 5: Solve for x
    x = 717,571,815,222.78/919,129.80
  6. Step 6: Final answer
    x = 780,707.81

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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.