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Finding the Fourth Proportional to 529,692.91, 730,990.62 and 287,991.73

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Solution

The fourth proportional to 529,692.91, 730,990.62 and 287,991.73 is: 397,436.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,692.91 : 730,990.62 = 287,991.73 : x
  2. Step 2: Convert to fraction form
    529,692.91/730,990.62 = 287,991.73/x
  3. Step 3: Cross multiply
    529,692.91x = 730,990.62 × 287,991.73
  4. Step 4: Simplify right side
    529,692.91x = 210,519,253,267.57
  5. Step 5: Solve for x
    x = 210,519,253,267.57/529,692.91
  6. Step 6: Final answer
    x = 397,436.42

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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.