Home / 681,128.46-1,021,692.96-281,329.86

Finding the Fourth Proportional to 681,128.46, 1,021,692.96 and 281,329.86

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Solution

The fourth proportional to 681,128.46, 1,021,692.96 and 281,329.86 is: 421,994.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,128.46 : 1,021,692.96 = 281,329.86 : x
  2. Step 2: Convert to fraction form
    681,128.46/1,021,692.96 = 281,329.86/x
  3. Step 3: Cross multiply
    681,128.46x = 1,021,692.96 × 281,329.86
  4. Step 4: Simplify right side
    681,128.46x = 287,432,737,399.79
  5. Step 5: Solve for x
    x = 287,432,737,399.79/681,128.46
  6. Step 6: Final answer
    x = 421,994.90

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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.