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Finding the Fourth Proportional to 656,781.22, 983,695.56 and 399,918.07

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Solution

The fourth proportional to 656,781.22, 983,695.56 and 399,918.07 is: 598,978.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,781.22 : 983,695.56 = 399,918.07 : x
  2. Step 2: Convert to fraction form
    656,781.22/983,695.56 = 399,918.07/x
  3. Step 3: Cross multiply
    656,781.22x = 983,695.56 × 399,918.07
  4. Step 4: Simplify right side
    656,781.22x = 393,397,629,822.77
  5. Step 5: Solve for x
    x = 393,397,629,822.77/656,781.22
  6. Step 6: Final answer
    x = 598,978.20

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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.