Home / 919,035.60-1,378,553.90-287,998.80

Finding the Fourth Proportional to 919,035.60, 1,378,553.90 and 287,998.80

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Solution

The fourth proportional to 919,035.60, 1,378,553.90 and 287,998.80 is: 431,998.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,035.60 : 1,378,553.90 = 287,998.80 : x
  2. Step 2: Convert to fraction form
    919,035.60/1,378,553.90 = 287,998.80/x
  3. Step 3: Cross multiply
    919,035.60x = 1,378,553.90 × 287,998.80
  4. Step 4: Simplify right side
    919,035.60x = 397,021,868,935.32
  5. Step 5: Solve for x
    x = 397,021,868,935.32/919,035.60
  6. Step 6: Final answer
    x = 431,998.36

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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.