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Finding the Fourth Proportional to 418,825.55, 628,230.21 and 119,308.07

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Solution

The fourth proportional to 418,825.55, 628,230.21 and 119,308.07 is: 178,959.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,825.55 : 628,230.21 = 119,308.07 : x
  2. Step 2: Convert to fraction form
    418,825.55/628,230.21 = 119,308.07/x
  3. Step 3: Cross multiply
    418,825.55x = 628,230.21 × 119,308.07
  4. Step 4: Simplify right side
    418,825.55x = 74,952,930,729.64
  5. Step 5: Solve for x
    x = 74,952,930,729.64/418,825.55
  6. Step 6: Final answer
    x = 178,959.79

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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.