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Finding the Fourth Proportional to 665,777.98, 918,655.51 and 393,857.33

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Solution

The fourth proportional to 665,777.98, 918,655.51 and 393,857.33 is: 543,453.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,777.98 : 918,655.51 = 393,857.33 : x
  2. Step 2: Convert to fraction form
    665,777.98/918,655.51 = 393,857.33/x
  3. Step 3: Cross multiply
    665,777.98x = 918,655.51 × 393,857.33
  4. Step 4: Simplify right side
    665,777.98x = 361,819,204,389.10
  5. Step 5: Solve for x
    x = 361,819,204,389.10/665,777.98
  6. Step 6: Final answer
    x = 543,453.25

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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.