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Finding the Fourth Proportional to 627,391.98, 865,806.12 and 340,912.07

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Solution

The fourth proportional to 627,391.98, 865,806.12 and 340,912.07 is: 470,461.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,391.98 : 865,806.12 = 340,912.07 : x
  2. Step 2: Convert to fraction form
    627,391.98/865,806.12 = 340,912.07/x
  3. Step 3: Cross multiply
    627,391.98x = 865,806.12 × 340,912.07
  4. Step 4: Simplify right side
    627,391.98x = 295,163,752,258.84
  5. Step 5: Solve for x
    x = 295,163,752,258.84/627,391.98
  6. Step 6: Final answer
    x = 470,461.47

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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.