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Finding the Fourth Proportional to 621,104.64, 857,154.81 and 349,258.11

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Solution

The fourth proportional to 621,104.64, 857,154.81 and 349,258.11 is: 481,993.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,104.64 : 857,154.81 = 349,258.11 : x
  2. Step 2: Convert to fraction form
    621,104.64/857,154.81 = 349,258.11/x
  3. Step 3: Cross multiply
    621,104.64x = 857,154.81 × 349,258.11
  4. Step 4: Simplify right side
    621,104.64x = 299,368,268,918.01
  5. Step 5: Solve for x
    x = 299,368,268,918.01/621,104.64
  6. Step 6: Final answer
    x = 481,993.29

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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.