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Finding the Fourth Proportional to 422,654.88, 583,351.76 and 388,609.21

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Solution

The fourth proportional to 422,654.88, 583,351.76 and 388,609.21 is: 536,361.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,654.88 : 583,351.76 = 388,609.21 : x
  2. Step 2: Convert to fraction form
    422,654.88/583,351.76 = 388,609.21/x
  3. Step 3: Cross multiply
    422,654.88x = 583,351.76 × 388,609.21
  4. Step 4: Simplify right side
    422,654.88x = 226,695,866,118.85
  5. Step 5: Solve for x
    x = 226,695,866,118.85/422,654.88
  6. Step 6: Final answer
    x = 536,361.64

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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.