Home / 579,739.20-869,608.80-259,890.45

Finding the Fourth Proportional to 579,739.20, 869,608.80 and 259,890.45

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Solution

The fourth proportional to 579,739.20, 869,608.80 and 259,890.45 is: 389,835.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,739.20 : 869,608.80 = 259,890.45 : x
  2. Step 2: Convert to fraction form
    579,739.20/869,608.80 = 259,890.45/x
  3. Step 3: Cross multiply
    579,739.20x = 869,608.80 × 259,890.45
  4. Step 4: Simplify right side
    579,739.20x = 226,003,022,355.96
  5. Step 5: Solve for x
    x = 226,003,022,355.96/579,739.20
  6. Step 6: Final answer
    x = 389,835.68

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Half scale
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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.