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Finding the Fourth Proportional to 428,896.57, 643,350.33 and 113,350.75

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Solution

The fourth proportional to 428,896.57, 643,350.33 and 113,350.75 is: 170,027.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,896.57 : 643,350.33 = 113,350.75 : x
  2. Step 2: Convert to fraction form
    428,896.57/643,350.33 = 113,350.75/x
  3. Step 3: Cross multiply
    428,896.57x = 643,350.33 × 113,350.75
  4. Step 4: Simplify right side
    428,896.57x = 72,924,242,418.25
  5. Step 5: Solve for x
    x = 72,924,242,418.25/428,896.57
  6. Step 6: Final answer
    x = 170,027.57

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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.