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Finding the Fourth Proportional to 425,329.80, 638,286.30 and 188,842.20

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Solution

The fourth proportional to 425,329.80, 638,286.30 and 188,842.20 is: 283,392.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,329.80 : 638,286.30 = 188,842.20 : x
  2. Step 2: Convert to fraction form
    425,329.80/638,286.30 = 188,842.20/x
  3. Step 3: Cross multiply
    425,329.80x = 638,286.30 × 188,842.20
  4. Step 4: Simplify right side
    425,329.80x = 120,535,389,121.86
  5. Step 5: Solve for x
    x = 120,535,389,121.86/425,329.80
  6. Step 6: Final answer
    x = 283,392.77

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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.