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Finding the Fourth Proportional to 644,163.40, 888,928.41 and 357,676.12

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Solution

The fourth proportional to 644,163.40, 888,928.41 and 357,676.12 is: 493,583.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,163.40 : 888,928.41 = 357,676.12 : x
  2. Step 2: Convert to fraction form
    644,163.40/888,928.41 = 357,676.12/x
  3. Step 3: Cross multiply
    644,163.40x = 888,928.41 × 357,676.12
  4. Step 4: Simplify right side
    644,163.40x = 317,948,464,646.57
  5. Step 5: Solve for x
    x = 317,948,464,646.57/644,163.40
  6. Step 6: Final answer
    x = 493,583.56

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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.