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Finding the Fourth Proportional to 628,170.93, 941,899.32 and 428,733

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Solution

The fourth proportional to 628,170.93, 941,899.32 and 428,733 is: 642,855.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,170.93 : 941,899.32 = 428,733 : x
  2. Step 2: Convert to fraction form
    628,170.93/941,899.32 = 428,733/x
  3. Step 3: Cross multiply
    628,170.93x = 941,899.32 × 428,733
  4. Step 4: Simplify right side
    628,170.93x = 403,823,321,161.56
  5. Step 5: Solve for x
    x = 403,823,321,161.56/628,170.93
  6. Step 6: Final answer
    x = 642,855.79

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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.