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Finding the Fourth Proportional to 628,205.22, 866,918.97 and 356,326.02

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Solution

The fourth proportional to 628,205.22, 866,918.97 and 356,326.02 is: 491,727.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,205.22 : 866,918.97 = 356,326.02 : x
  2. Step 2: Convert to fraction form
    628,205.22/866,918.97 = 356,326.02/x
  3. Step 3: Cross multiply
    628,205.22x = 866,918.97 × 356,326.02
  4. Step 4: Simplify right side
    628,205.22x = 308,905,786,242.60
  5. Step 5: Solve for x
    x = 308,905,786,242.60/628,205.22
  6. Step 6: Final answer
    x = 491,727.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.