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Finding the Fourth Proportional to 709,181.74, 978,651.36 and 386,891.74

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Solution

The fourth proportional to 709,181.74, 978,651.36 and 386,891.74 is: 533,900.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,181.74 : 978,651.36 = 386,891.74 : x
  2. Step 2: Convert to fraction form
    709,181.74/978,651.36 = 386,891.74/x
  3. Step 3: Cross multiply
    709,181.74x = 978,651.36 × 386,891.74
  4. Step 4: Simplify right side
    709,181.74x = 378,632,127,523.77
  5. Step 5: Solve for x
    x = 378,632,127,523.77/709,181.74
  6. Step 6: Final answer
    x = 533,900.00

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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.