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Finding the Fourth Proportional to 521,850.84, 783,039.06 and 388,997.88

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Solution

The fourth proportional to 521,850.84, 783,039.06 and 388,997.88 is: 583,692.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,850.84 : 783,039.06 = 388,997.88 : x
  2. Step 2: Convert to fraction form
    521,850.84/783,039.06 = 388,997.88/x
  3. Step 3: Cross multiply
    521,850.84x = 783,039.06 × 388,997.88
  4. Step 4: Simplify right side
    521,850.84x = 304,600,534,297.19
  5. Step 5: Solve for x
    x = 304,600,534,297.19/521,850.84
  6. Step 6: Final answer
    x = 583,692.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.