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Finding the Fourth Proportional to 553,578.43, 763,994.69 and 338,860.39

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Solution

The fourth proportional to 553,578.43, 763,994.69 and 338,860.39 is: 467,661.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,578.43 : 763,994.69 = 338,860.39 : x
  2. Step 2: Convert to fraction form
    553,578.43/763,994.69 = 338,860.39/x
  3. Step 3: Cross multiply
    553,578.43x = 763,994.69 × 338,860.39
  4. Step 4: Simplify right side
    553,578.43x = 258,887,538,611.33
  5. Step 5: Solve for x
    x = 258,887,538,611.33/553,578.43
  6. Step 6: Final answer
    x = 467,661.90

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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.