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Finding the Fourth Proportional to 265,297.99, 397,891.20 and 85,399.51

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Solution

The fourth proportional to 265,297.99, 397,891.20 and 85,399.51 is: 128,081.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,297.99 : 397,891.20 = 85,399.51 : x
  2. Step 2: Convert to fraction form
    265,297.99/397,891.20 = 85,399.51/x
  3. Step 3: Cross multiply
    265,297.99x = 397,891.20 × 85,399.51
  4. Step 4: Simplify right side
    265,297.99x = 33,979,713,513.31
  5. Step 5: Solve for x
    x = 33,979,713,513.31/265,297.99
  6. Step 6: Final answer
    x = 128,081.31

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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.