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Finding the Fourth Proportional to 626,705.56, 940,361.22 and 389,986.84

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Solution

The fourth proportional to 626,705.56, 940,361.22 and 389,986.84 is: 585,168.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,705.56 : 940,361.22 = 389,986.84 : x
  2. Step 2: Convert to fraction form
    626,705.56/940,361.22 = 389,986.84/x
  3. Step 3: Cross multiply
    626,705.56x = 940,361.22 × 389,986.84
  4. Step 4: Simplify right side
    626,705.56x = 366,728,500,646.35
  5. Step 5: Solve for x
    x = 366,728,500,646.35/626,705.56
  6. Step 6: Final answer
    x = 585,168.74

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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.