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Finding the Fourth Proportional to 627,390.29, 865,803.78 and 340,910.37

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Solution

The fourth proportional to 627,390.29, 865,803.78 and 340,910.37 is: 470,459.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,390.29 : 865,803.78 = 340,910.37 : x
  2. Step 2: Convert to fraction form
    627,390.29/865,803.78 = 340,910.37/x
  3. Step 3: Cross multiply
    627,390.29x = 865,803.78 × 340,910.37
  4. Step 4: Simplify right side
    627,390.29x = 295,161,489,735.23
  5. Step 5: Solve for x
    x = 295,161,489,735.23/627,390.29
  6. Step 6: Final answer
    x = 470,459.13

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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.