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Finding the Fourth Proportional to 620,289, 855,998.82 and 337,665

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Solution

The fourth proportional to 620,289, 855,998.82 and 337,665 is: 465,977.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,289 : 855,998.82 = 337,665 : x
  2. Step 2: Convert to fraction form
    620,289/855,998.82 = 337,665/x
  3. Step 3: Cross multiply
    620,289x = 855,998.82 × 337,665
  4. Step 4: Simplify right side
    620,289x = 289,040,841,555.30
  5. Step 5: Solve for x
    x = 289,040,841,555.30/620,289
  6. Step 6: Final answer
    x = 465,977.70

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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.