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Finding the Fourth Proportional to 620,992.83, 931,395.66 and 397,912.16

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Solution

The fourth proportional to 620,992.83, 931,395.66 and 397,912.16 is: 596,808.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,992.83 : 931,395.66 = 397,912.16 : x
  2. Step 2: Convert to fraction form
    620,992.83/931,395.66 = 397,912.16/x
  3. Step 3: Cross multiply
    620,992.83x = 931,395.66 × 397,912.16
  4. Step 4: Simplify right side
    620,992.83x = 370,613,661,959.80
  5. Step 5: Solve for x
    x = 370,613,661,959.80/620,992.83
  6. Step 6: Final answer
    x = 596,808.28

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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.