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Finding the Fourth Proportional to 709,843.05, 979,578.29 and 387,553.16

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Solution

The fourth proportional to 709,843.05, 979,578.29 and 387,553.16 is: 534,820.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,843.05 : 979,578.29 = 387,553.16 : x
  2. Step 2: Convert to fraction form
    709,843.05/979,578.29 = 387,553.16/x
  3. Step 3: Cross multiply
    709,843.05x = 979,578.29 × 387,553.16
  4. Step 4: Simplify right side
    709,843.05x = 379,638,665,174.73
  5. Step 5: Solve for x
    x = 379,638,665,174.73/709,843.05
  6. Step 6: Final answer
    x = 534,820.57

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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.