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Finding the Fourth Proportional to 628,251.68, 942,020.51 and 428,813.48

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Solution

The fourth proportional to 628,251.68, 942,020.51 and 428,813.48 is: 642,976.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,251.68 : 942,020.51 = 428,813.48 : x
  2. Step 2: Convert to fraction form
    628,251.68/942,020.51 = 428,813.48/x
  3. Step 3: Cross multiply
    628,251.68x = 942,020.51 × 428,813.48
  4. Step 4: Simplify right side
    628,251.68x = 403,951,086,270.31
  5. Step 5: Solve for x
    x = 403,951,086,270.31/628,251.68
  6. Step 6: Final answer
    x = 642,976.54

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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.