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Finding the Fourth Proportional to 627,391.35, 865,805.54 and 340,911.43

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Solution

The fourth proportional to 627,391.35, 865,805.54 and 340,911.43 is: 470,460.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,391.35 : 865,805.54 = 340,911.43 : x
  2. Step 2: Convert to fraction form
    627,391.35/865,805.54 = 340,911.43/x
  3. Step 3: Cross multiply
    627,391.35x = 865,805.54 × 340,911.43
  4. Step 4: Simplify right side
    627,391.35x = 295,163,000,874.25
  5. Step 5: Solve for x
    x = 295,163,000,874.25/627,391.35
  6. Step 6: Final answer
    x = 470,460.74

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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.