Home / 919,243.20-1,378,864.80-620,644.80

Finding the Fourth Proportional to 919,243.20, 1,378,864.80 and 620,644.80

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Solution

The fourth proportional to 919,243.20, 1,378,864.80 and 620,644.80 is: 930,967.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,243.20 : 1,378,864.80 = 620,644.80 : x
  2. Step 2: Convert to fraction form
    919,243.20/1,378,864.80 = 620,644.80/x
  3. Step 3: Cross multiply
    919,243.20x = 1,378,864.80 × 620,644.80
  4. Step 4: Simplify right side
    919,243.20x = 855,785,268,023.04
  5. Step 5: Solve for x
    x = 855,785,268,023.04/919,243.20
  6. Step 6: Final answer
    x = 930,967.20

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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.