Home / 858,086.70-1,287,130.05-543,936.30

Finding the Fourth Proportional to 858,086.70, 1,287,130.05 and 543,936.30

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Solution

The fourth proportional to 858,086.70, 1,287,130.05 and 543,936.30 is: 815,904.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,086.70 : 1,287,130.05 = 543,936.30 : x
  2. Step 2: Convert to fraction form
    858,086.70/1,287,130.05 = 543,936.30/x
  3. Step 3: Cross multiply
    858,086.70x = 1,287,130.05 × 543,936.30
  4. Step 4: Simplify right side
    858,086.70x = 700,116,757,015.82
  5. Step 5: Solve for x
    x = 700,116,757,015.82/858,086.70
  6. Step 6: Final answer
    x = 815,904.45

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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.