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Finding the Fourth Proportional to 627,338.98, 865,731 and 340,859.80

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Solution

The fourth proportional to 627,338.98, 865,731 and 340,859.80 is: 470,388.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,338.98 : 865,731 = 340,859.80 : x
  2. Step 2: Convert to fraction form
    627,338.98/865,731 = 340,859.80/x
  3. Step 3: Cross multiply
    627,338.98x = 865,731 × 340,859.80
  4. Step 4: Simplify right side
    627,338.98x = 295,092,895,513.80
  5. Step 5: Solve for x
    x = 295,092,895,513.80/627,338.98
  6. Step 6: Final answer
    x = 470,388.27

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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.