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Finding the Fourth Proportional to 709,181.23, 978,650.67 and 386,891.24

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Solution

The fourth proportional to 709,181.23, 978,650.67 and 386,891.24 is: 533,899.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,181.23 : 978,650.67 = 386,891.24 : x
  2. Step 2: Convert to fraction form
    709,181.23/978,650.67 = 386,891.24/x
  3. Step 3: Cross multiply
    709,181.23x = 978,650.67 × 386,891.24
  4. Step 4: Simplify right side
    709,181.23x = 378,631,371,243.13
  5. Step 5: Solve for x
    x = 378,631,371,243.13/709,181.23
  6. Step 6: Final answer
    x = 533,899.31

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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.