Home / 919,489.80-1,379,234.70-414,292.80

Finding the Fourth Proportional to 919,489.80, 1,379,234.70 and 414,292.80

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Solution

The fourth proportional to 919,489.80, 1,379,234.70 and 414,292.80 is: 621,439.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,489.80 : 1,379,234.70 = 414,292.80 : x
  2. Step 2: Convert to fraction form
    919,489.80/1,379,234.70 = 414,292.80/x
  3. Step 3: Cross multiply
    919,489.80x = 1,379,234.70 × 414,292.80
  4. Step 4: Simplify right side
    919,489.80x = 571,407,005,720.16
  5. Step 5: Solve for x
    x = 571,407,005,720.16/919,489.80
  6. Step 6: Final answer
    x = 621,439.20

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Double scale
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Similar ratio
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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.