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Finding the Fourth Proportional to 709,201.17, 978,663.49 and 386,892.05

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Solution

The fourth proportional to 709,201.17, 978,663.49 and 386,892.05 is: 533,892.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,201.17 : 978,663.49 = 386,892.05 : x
  2. Step 2: Convert to fraction form
    709,201.17/978,663.49 = 386,892.05/x
  3. Step 3: Cross multiply
    709,201.17x = 978,663.49 × 386,892.05
  4. Step 4: Simplify right side
    709,201.17x = 378,637,118,045.71
  5. Step 5: Solve for x
    x = 378,637,118,045.71/709,201.17
  6. Step 6: Final answer
    x = 533,892.40

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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.