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Finding the Fourth Proportional to 621,083.88, 930,961.44 and 321,262.56

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Solution

The fourth proportional to 621,083.88, 930,961.44 and 321,262.56 is: 481,550.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,083.88 : 930,961.44 = 321,262.56 : x
  2. Step 2: Convert to fraction form
    621,083.88/930,961.44 = 321,262.56/x
  3. Step 3: Cross multiply
    621,083.88x = 930,961.44 × 321,262.56
  4. Step 4: Simplify right side
    621,083.88x = 299,083,055,475.69
  5. Step 5: Solve for x
    x = 299,083,055,475.69/621,083.88
  6. Step 6: Final answer
    x = 481,550.18

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1.5x scale

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.