Home / 656,521.20-984,781.80-213,289.20

Finding the Fourth Proportional to 656,521.20, 984,781.80 and 213,289.20

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Solution

The fourth proportional to 656,521.20, 984,781.80 and 213,289.20 is: 319,933.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,521.20 : 984,781.80 = 213,289.20 : x
  2. Step 2: Convert to fraction form
    656,521.20/984,781.80 = 213,289.20/x
  3. Step 3: Cross multiply
    656,521.20x = 984,781.80 × 213,289.20
  4. Step 4: Simplify right side
    656,521.20x = 210,043,322,296.56
  5. Step 5: Solve for x
    x = 210,043,322,296.56/656,521.20
  6. Step 6: Final answer
    x = 319,933.80

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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.