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Finding the Fourth Proportional to 420,198.58, 579,860.94 and 238,930.30

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Solution

The fourth proportional to 420,198.58, 579,860.94 and 238,930.30 is: 329,716.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,198.58 : 579,860.94 = 238,930.30 : x
  2. Step 2: Convert to fraction form
    420,198.58/579,860.94 = 238,930.30/x
  3. Step 3: Cross multiply
    420,198.58x = 579,860.94 × 238,930.30
  4. Step 4: Simplify right side
    420,198.58x = 138,546,348,352.48
  5. Step 5: Solve for x
    x = 138,546,348,352.48/420,198.58
  6. Step 6: Final answer
    x = 329,716.36

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1.5x scale

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.