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Finding the Fourth Proportional to 330,211.76, 455,692.50 and 186,972.03

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Solution

The fourth proportional to 330,211.76, 455,692.50 and 186,972.03 is: 258,021.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,211.76 : 455,692.50 = 186,972.03 : x
  2. Step 2: Convert to fraction form
    330,211.76/455,692.50 = 186,972.03/x
  3. Step 3: Cross multiply
    330,211.76x = 455,692.50 × 186,972.03
  4. Step 4: Simplify right side
    330,211.76x = 85,201,751,780.78
  5. Step 5: Solve for x
    x = 85,201,751,780.78/330,211.76
  6. Step 6: Final answer
    x = 258,021.56

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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.