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Finding the Fourth Proportional to 990,954, 1,486,505.16 and 281,039.22

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Solution

The fourth proportional to 990,954, 1,486,505.16 and 281,039.22 is: 421,579.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,954 : 1,486,505.16 = 281,039.22 : x
  2. Step 2: Convert to fraction form
    990,954/1,486,505.16 = 281,039.22/x
  3. Step 3: Cross multiply
    990,954x = 1,486,505.16 × 281,039.22
  4. Step 4: Simplify right side
    990,954x = 417,766,250,692.38
  5. Step 5: Solve for x
    x = 417,766,250,692.38/990,954
  6. Step 6: Final answer
    x = 421,579.86

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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.