Home / 811,612.14-1,120,383.48-485,040.36

Finding the Fourth Proportional to 811,612.14, 1,120,383.48 and 485,040.36

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Solution

The fourth proportional to 811,612.14, 1,120,383.48 and 485,040.36 is: 669,570.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,612.14 : 1,120,383.48 = 485,040.36 : x
  2. Step 2: Convert to fraction form
    811,612.14/1,120,383.48 = 485,040.36/x
  3. Step 3: Cross multiply
    811,612.14x = 1,120,383.48 × 485,040.36
  4. Step 4: Simplify right side
    811,612.14x = 543,431,206,477.25
  5. Step 5: Solve for x
    x = 543,431,206,477.25/811,612.14
  6. Step 6: Final answer
    x = 669,570.08

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.