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Finding the Fourth Proportional to 627,421.29, 865,840.71 and 340,940.69

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Solution

The fourth proportional to 627,421.29, 865,840.71 and 340,940.69 is: 470,497.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,421.29 : 865,840.71 = 340,940.69 : x
  2. Step 2: Convert to fraction form
    627,421.29/865,840.71 = 340,940.69/x
  3. Step 3: Cross multiply
    627,421.29x = 865,840.71 × 340,940.69
  4. Step 4: Simplify right side
    627,421.29x = 295,200,324,768.29
  5. Step 5: Solve for x
    x = 295,200,324,768.29/627,421.29
  6. Step 6: Final answer
    x = 470,497.78

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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.