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Finding the Fourth Proportional to 628,687.44, 943,021.94 and 155,372.78

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Solution

The fourth proportional to 628,687.44, 943,021.94 and 155,372.78 is: 233,056.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,687.44 : 943,021.94 = 155,372.78 : x
  2. Step 2: Convert to fraction form
    628,687.44/943,021.94 = 155,372.78/x
  3. Step 3: Cross multiply
    628,687.44x = 943,021.94 × 155,372.78
  4. Step 4: Simplify right side
    628,687.44x = 146,519,943,164.78
  5. Step 5: Solve for x
    x = 146,519,943,164.78/628,687.44
  6. Step 6: Final answer
    x = 233,056.90

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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.