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Finding the Fourth Proportional to 425,399.45, 638,198.44 and 141,069.20

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Solution

The fourth proportional to 425,399.45, 638,198.44 and 141,069.20 is: 211,636.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,399.45 : 638,198.44 = 141,069.20 : x
  2. Step 2: Convert to fraction form
    425,399.45/638,198.44 = 141,069.20/x
  3. Step 3: Cross multiply
    425,399.45x = 638,198.44 × 141,069.20
  4. Step 4: Simplify right side
    425,399.45x = 90,030,142,221.63
  5. Step 5: Solve for x
    x = 90,030,142,221.63/425,399.45
  6. Step 6: Final answer
    x = 211,636.72

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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.