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Finding the Fourth Proportional to 709,115.45, 978,593.20 and 386,837.51

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Solution

The fourth proportional to 709,115.45, 978,593.20 and 386,837.51 is: 533,843.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,115.45 : 978,593.20 = 386,837.51 : x
  2. Step 2: Convert to fraction form
    709,115.45/978,593.20 = 386,837.51/x
  3. Step 3: Cross multiply
    709,115.45x = 978,593.20 × 386,837.51
  4. Step 4: Simplify right side
    709,115.45x = 378,556,550,930.87
  5. Step 5: Solve for x
    x = 378,556,550,930.87/709,115.45
  6. Step 6: Final answer
    x = 533,843.33

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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.