Home / 878,260.51-1,211,943.38-491,107.85

Finding the Fourth Proportional to 878,260.51, 1,211,943.38 and 491,107.85

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Solution

The fourth proportional to 878,260.51, 1,211,943.38 and 491,107.85 is: 677,697.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,260.51 : 1,211,943.38 = 491,107.85 : x
  2. Step 2: Convert to fraction form
    878,260.51/1,211,943.38 = 491,107.85/x
  3. Step 3: Cross multiply
    878,260.51x = 1,211,943.38 × 491,107.85
  4. Step 4: Simplify right side
    878,260.51x = 595,194,907,673.53
  5. Step 5: Solve for x
    x = 595,194,907,673.53/878,260.51
  6. Step 6: Final answer
    x = 677,697.45

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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.