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Finding the Fourth Proportional to 627,138.98, 865,451.12 and 340,659.28

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Solution

The fourth proportional to 627,138.98, 865,451.12 and 340,659.28 is: 470,109.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,138.98 : 865,451.12 = 340,659.28 : x
  2. Step 2: Convert to fraction form
    627,138.98/865,451.12 = 340,659.28/x
  3. Step 3: Cross multiply
    627,138.98x = 865,451.12 × 340,659.28
  4. Step 4: Simplify right side
    627,138.98x = 294,823,955,414.39
  5. Step 5: Solve for x
    x = 294,823,955,414.39/627,138.98
  6. Step 6: Final answer
    x = 470,109.44

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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.