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Finding the Fourth Proportional to 656,782.22, 983,697.06 and 399,919.07

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Solution

The fourth proportional to 656,782.22, 983,697.06 and 399,919.07 is: 598,979.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,782.22 : 983,697.06 = 399,919.07 : x
  2. Step 2: Convert to fraction form
    656,782.22/983,697.06 = 399,919.07/x
  3. Step 3: Cross multiply
    656,782.22x = 983,697.06 × 399,919.07
  4. Step 4: Simplify right side
    656,782.22x = 393,399,213,396.93
  5. Step 5: Solve for x
    x = 393,399,213,396.93/656,782.22
  6. Step 6: Final answer
    x = 598,979.69

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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.